diff --git a/test/CFrontend/2003-08-20-vfork-bug.c b/test/CFrontend/2003-08-20-vfork-bug.c
new file mode 100644
index 00000000000..ac6db4672e1
--- /dev/null
+++ b/test/CFrontend/2003-08-20-vfork-bug.c
@@ -0,0 +1,4 @@
+extern int vfork(void);
+test() {
+  vfork();
+}