diff --git a/src/os/rtems/inc/os-rtems.h b/src/os/rtems/inc/os-rtems.h
index b22abbe87..8b2eed570 100644
--- a/src/os/rtems/inc/os-rtems.h
+++ b/src/os/rtems/inc/os-rtems.h
@@ -47,6 +47,12 @@
 #include <rtems/malloc.h>
 #include <rtems/rtems/intr.h>
 
+#ifndef _RTEMS_5_
+
+#include <rtems/rtl/rtl.h> /* needed for RTEMS 4.11 alias */
+
+#endif
+
 #include "os-shared-globaldefs.h"
 
 /****************************************************************************************
@@ -60,17 +66,27 @@
 #define OSAL_UNRESOLV_REC_TYPE  rtems_rtl_unresolv_rec
 #define OSAL_UNRESOLVED_SYMBOL  rtems_rtl_unresolved_symbol
 #define OSAL_UNRESOLVED_ITERATE rtems_rtl_unresolved_iterate
+
 #else
+
 #define OSAL_HEAP_INFO_BLOCK    region_information_block
 #define OSAL_UNRESOLV_REC_TYPE  rtems_rtl_unresolv_rec_t
 #define OSAL_UNRESOLVED_SYMBOL  rtems_rtl_unresolved_name
 #define OSAL_UNRESOLVED_ITERATE rtems_rtl_unresolved_interate
+
 #endif
 
+
 /****************************************************************************************
                                     TYPEDEFS
  ***************************************************************************************/
 
+#ifndef _RTEMS_5_
+
+typedef rtems_rtl_obj_t rtems_rtl_obj; /* Alias for RTEMS 4.11 */
+
+#endif
+
 typedef struct
 {
     uint32   ClockAccuracyNsec;
diff --git a/src/os/rtems/src/os-impl-loader.c b/src/os/rtems/src/os-impl-loader.c
index 93b864dc6..14562d0c3 100644
--- a/src/os/rtems/src/os-impl-loader.c
+++ b/src/os/rtems/src/os-impl-loader.c
@@ -217,7 +217,7 @@ int32 OS_ModuleUnload_Impl(const OS_object_token_t *token)
  *-----------------------------------------------------------------*/
 int32 OS_ModuleGetInfo_Impl(const OS_object_token_t *token, OS_module_prop_t *module_prop)
 {
-    rtems_rtl_obj *                   obj;
+    rtems_rtl_obj                    *obj;
     OS_impl_module_internal_record_t *impl;
     int32                             status = OS_ERROR;
 
@@ -232,12 +232,12 @@ int32 OS_ModuleGetInfo_Impl(const OS_object_token_t *token, OS_module_prop_t *mo
         if (obj != NULL)
         {
             module_prop->addr.valid        = true;
-            module_prop->addr.code_address = obj->text_base;
-            module_prop->addr.code_size    = rtems_rtl_obj_text_size(obj);
-            module_prop->addr.data_address = obj->data_base;
-            module_prop->addr.data_size    = rtems_rtl_obj_data_size(obj);
-            module_prop->addr.bss_address  = obj->bss_base;
-            module_prop->addr.bss_size     = rtems_rtl_obj_bss_size(obj);
+            module_prop->addr.code_address = (cpuaddr) obj->text_base;
+            module_prop->addr.code_size    = (cpuaddr) rtems_rtl_obj_text_size(obj);
+            module_prop->addr.data_address = (cpuaddr) obj->data_base;
+            module_prop->addr.data_size    = (cpuaddr) rtems_rtl_obj_data_size(obj);
+            module_prop->addr.bss_address  = (cpuaddr) obj->bss_base;
+            module_prop->addr.bss_size     = (cpuaddr) rtems_rtl_obj_bss_size(obj);
 
             status = OS_SUCCESS;
         }