diff --git a/nptl/tst-locale1.c b/nptl/tst-locale1.c
index 08b43704e5..2ee4c3fbce 100644
--- a/nptl/tst-locale1.c
+++ b/nptl/tst-locale1.c
@@ -10,7 +10,8 @@
 int
 useless (void)
 {
-  pthread_create (0, 0, 0, 0);
+  pthread_t th;
+  pthread_create (&th, 0, (void *(*) (void *)) useless, 0);
   /* This is to check __libc_current_sigrt* can be used in statically
      linked apps.  */
   return SIGRTMIN;
diff --git a/nptl/tst-locale2.c b/nptl/tst-locale2.c
index 2c803e3ef0..c8821ad6b8 100644
--- a/nptl/tst-locale2.c
+++ b/nptl/tst-locale2.c
@@ -6,8 +6,9 @@
 #include <pthread.h>
 
 /* This is never called, just here to get pthreads linked in.  */
-void
-useless (void)
+void *
+useless (void *a)
 {
-  pthread_create (0, 0, 0, 0);
+  pthread_t th;
+  pthread_create (&th, 0, useless, a);
 }