diff --git a/src/libs/stdc++/vfork.c b/src/libs/stdc++/vfork.c
index b75e314036..a7bb77674f 100644
--- a/src/libs/stdc++/vfork.c
+++ b/src/libs/stdc++/vfork.c
@@ -3,8 +3,8 @@
 
 #include <unistd.h>
 
-int
-vfork ()
+pid_t
+vfork (void)
 {
   return (fork ());
 }