diff --git a/components/libc/compilers/common/include/sys/signal.h b/components/libc/compilers/common/include/sys/signal.h
index 6e06c8ba14c2a76674cd367b9ab9290c7c668fe5..8e67ae9ae147328451a0209039c1b253e29f090c 100644
--- a/components/libc/compilers/common/include/sys/signal.h
+++ b/components/libc/compilers/common/include/sys/signal.h
@@ -17,7 +17,17 @@ extern "C" {
 #endif /* __cplusplus */
 
 #ifdef RT_USING_MUSLLIBC
+/* this is require for musl <signal.h> */
+#ifndef _POSIX_SOURCE
+#define _POSIX_SOURCE
 #include <signal.h>
+/* limit influenced of _POSIX_SOURCE */
+#undef _POSIX_SOURCE
+
+#else /* ndef _POSIX_SOURCE */
+#include <signal.h>
+#endif
+
 #else
 
 #include <stdint.h>