diff --git a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp
index 84992367..4eb42af5 100644
--- a/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp
+++ b/testsuites/unittest/process/basic/pthread/smoke/pthread_test_015.cpp
@@ -30,7 +30,10 @@
  */
 #include "it_pthread_test.h"
 
-static VOID *PthreadTest115(VOID *arg) {}
+static VOID *PthreadTest115(VOID *arg)
+{
+    return NULL;
+}
 
 static int GroupProcess(void)
 {