diff --git a/testcases/kernel/syscalls/signalfd4/signalfd4_02.c b/testcases/kernel/syscalls/signalfd4/signalfd4_02.c
index 6b2e1d0..7dce99c 100644
--- a/testcases/kernel/syscalls/signalfd4/signalfd4_02.c
+++ b/testcases/kernel/syscalls/signalfd4/signalfd4_02.c
@@ -55,6 +55,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <sys/syscall.h>
+#include <errno.h>
 
 /* Harness Specific Include Files. */
 #include "test.h"