diff --git a/portable/GCC/AVR32_UC3/portmacro.h b/portable/GCC/AVR32_UC3/portmacro.h
index 5bc7c8b0877..ebf5010919d 100644
--- a/portable/GCC/AVR32_UC3/portmacro.h
+++ b/portable/GCC/AVR32_UC3/portmacro.h
@@ -116,7 +116,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/CORTUS_APS3/portmacro.h b/portable/GCC/CORTUS_APS3/portmacro.h
index 37e739bb55f..9d2d0e0cdb5 100644
--- a/portable/GCC/CORTUS_APS3/portmacro.h
+++ b/portable/GCC/CORTUS_APS3/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/ColdFire_V2/portmacro.h b/portable/GCC/ColdFire_V2/portmacro.h
index 14d318b7b94..06ddbd88764 100644
--- a/portable/GCC/ColdFire_V2/portmacro.h
+++ b/portable/GCC/ColdFire_V2/portmacro.h
@@ -63,7 +63,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/H8S2329/portmacro.h b/portable/GCC/H8S2329/portmacro.h
index 829ff9f9b64..a5612cadfb8 100644
--- a/portable/GCC/H8S2329/portmacro.h
+++ b/portable/GCC/H8S2329/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/HCS12/portmacro.h b/portable/GCC/HCS12/portmacro.h
index a864419899f..a11b96c37d0 100644
--- a/portable/GCC/HCS12/portmacro.h
+++ b/portable/GCC/HCS12/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/MSP430F449/portmacro.h b/portable/GCC/MSP430F449/portmacro.h
index 5a6e1db9c94..2f70a24d1b2 100644
--- a/portable/GCC/MSP430F449/portmacro.h
+++ b/portable/GCC/MSP430F449/portmacro.h
@@ -63,7 +63,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/PPC405_Xilinx/portmacro.h b/portable/GCC/PPC405_Xilinx/portmacro.h
index e6f1c06c845..06cca5df9ed 100644
--- a/portable/GCC/PPC405_Xilinx/portmacro.h
+++ b/portable/GCC/PPC405_Xilinx/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/PPC440_Xilinx/portmacro.h b/portable/GCC/PPC440_Xilinx/portmacro.h
index e6f1c06c845..06cca5df9ed 100644
--- a/portable/GCC/PPC440_Xilinx/portmacro.h
+++ b/portable/GCC/PPC440_Xilinx/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/RL78/portmacro.h b/portable/GCC/RL78/portmacro.h
index 8108f1c1221..34940200838 100644
--- a/portable/GCC/RL78/portmacro.h
+++ b/portable/GCC/RL78/portmacro.h
@@ -59,7 +59,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/STR75x/portmacro.h b/portable/GCC/STR75x/portmacro.h
index 8d5e832c59e..876783dcb67 100644
--- a/portable/GCC/STR75x/portmacro.h
+++ b/portable/GCC/STR75x/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/78K0R/portmacro.h b/portable/IAR/78K0R/portmacro.h
index 4ccc083c080..03bb5dee7ef 100644
--- a/portable/IAR/78K0R/portmacro.h
+++ b/portable/IAR/78K0R/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/ATMega323/portmacro.h b/portable/IAR/ATMega323/portmacro.h
index 69ba2f1d9ac..cbc7b2d156b 100644
--- a/portable/IAR/ATMega323/portmacro.h
+++ b/portable/IAR/ATMega323/portmacro.h
@@ -71,7 +71,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AVR32_UC3/portmacro.h b/portable/IAR/AVR32_UC3/portmacro.h
index 73c206ca5f8..98aa5be0745 100644
--- a/portable/IAR/AVR32_UC3/portmacro.h
+++ b/portable/IAR/AVR32_UC3/portmacro.h
@@ -119,7 +119,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AVR_AVRDx/portmacro.h b/portable/IAR/AVR_AVRDx/portmacro.h
index 5b4b5be8b3c..cb3cb7ec201 100644
--- a/portable/IAR/AVR_AVRDx/portmacro.h
+++ b/portable/IAR/AVR_AVRDx/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned char    UBaseType_t;
     #define portMAX_DELAY    ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AVR_Mega0/portmacro.h b/portable/IAR/AVR_Mega0/portmacro.h
index 5b4b5be8b3c..cb3cb7ec201 100644
--- a/portable/IAR/AVR_Mega0/portmacro.h
+++ b/portable/IAR/AVR_Mega0/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned char    UBaseType_t;
     #define portMAX_DELAY    ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AtmelSAM7S64/portmacro.h b/portable/IAR/AtmelSAM7S64/portmacro.h
index 01c6eed6aad..9bcf8a67003 100644
--- a/portable/IAR/AtmelSAM7S64/portmacro.h
+++ b/portable/IAR/AtmelSAM7S64/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AtmelSAM9XE/portmacro.h b/portable/IAR/AtmelSAM9XE/portmacro.h
index db6f10cca85..fdc7c2ba684 100644
--- a/portable/IAR/AtmelSAM9XE/portmacro.h
+++ b/portable/IAR/AtmelSAM9XE/portmacro.h
@@ -67,7 +67,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/LPC2000/portmacro.h b/portable/IAR/LPC2000/portmacro.h
index 8fdf1fe75a3..2929ecba54a 100644
--- a/portable/IAR/LPC2000/portmacro.h
+++ b/portable/IAR/LPC2000/portmacro.h
@@ -67,7 +67,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/MSP430/portmacro.h b/portable/IAR/MSP430/portmacro.h
index 298307f5519..6dcec2f0314 100644
--- a/portable/IAR/MSP430/portmacro.h
+++ b/portable/IAR/MSP430/portmacro.h
@@ -58,7 +58,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/MSP430X/portmacro.h b/portable/IAR/MSP430X/portmacro.h
index 1ab4665b9bf..72456cf11c0 100644
--- a/portable/IAR/MSP430X/portmacro.h
+++ b/portable/IAR/MSP430X/portmacro.h
@@ -67,7 +67,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/RL78/portmacro.h b/portable/IAR/RL78/portmacro.h
index 9685b569d5d..1cfe85fa650 100644
--- a/portable/IAR/RL78/portmacro.h
+++ b/portable/IAR/RL78/portmacro.h
@@ -82,7 +82,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/WizC/PIC18/portmacro.h b/portable/WizC/PIC18/portmacro.h
index ad70560e4ad..0fdba688eee 100644
--- a/portable/WizC/PIC18/portmacro.h
+++ b/portable/WizC/PIC18/portmacro.h
@@ -63,7 +63,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t )    ( 0xFFFF )
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif