diff --git a/src/inet/tests/TestInetCommonPosix.cpp b/src/inet/tests/TestInetCommonPosix.cpp
index 7d5a0639645c07..216c8c6315b7ec 100644
--- a/src/inet/tests/TestInetCommonPosix.cpp
+++ b/src/inet/tests/TestInetCommonPosix.cpp
@@ -41,7 +41,6 @@
 #include <vector>
 
 #include <inttypes.h>
-#include <signal.h>
 #include <stdint.h>
 #include <string.h>
 #include <sys/types.h>
diff --git a/src/lib/shell/streamer_mbed.cpp b/src/lib/shell/streamer_mbed.cpp
index 88c2c1bf8387e3..07596580003580 100644
--- a/src/lib/shell/streamer_mbed.cpp
+++ b/src/lib/shell/streamer_mbed.cpp
@@ -22,7 +22,6 @@
 
 #include <lib/shell/streamer.h>
 
-#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/src/lib/shell/streamer_stdio.cpp b/src/lib/shell/streamer_stdio.cpp
index 7dfd25070728d6..4e7be14e37f40c 100644
--- a/src/lib/shell/streamer_stdio.cpp
+++ b/src/lib/shell/streamer_stdio.cpp
@@ -22,7 +22,6 @@
 
 #include <lib/shell/streamer.h>
 
-#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <termios.h>
diff --git a/src/platform/Linux/PlatformManagerImpl.cpp b/src/platform/Linux/PlatformManagerImpl.cpp
index 852e06037582fb..2aa464bb07c2f6 100644
--- a/src/platform/Linux/PlatformManagerImpl.cpp
+++ b/src/platform/Linux/PlatformManagerImpl.cpp
@@ -42,7 +42,6 @@
 #include <linux/rtnetlink.h>
 #include <net/if.h>
 #include <netinet/in.h>
-#include <signal.h>
 #include <unistd.h>
 
 #if __GLIBC__ == 2 && __GLIBC_MINOR__ < 30
diff --git a/src/platform/webos/PlatformManagerImpl.cpp b/src/platform/webos/PlatformManagerImpl.cpp
index 50cfbbcc5d892c..92be732d7ec4eb 100644
--- a/src/platform/webos/PlatformManagerImpl.cpp
+++ b/src/platform/webos/PlatformManagerImpl.cpp
@@ -43,7 +43,6 @@
 #include <linux/rtnetlink.h>
 #include <net/if.h>
 #include <netinet/in.h>
-#include <signal.h>
 #include <unistd.h>
 
 #if __GLIBC__ == 2 && __GLIBC_MINOR__ < 30