diff --git a/src/lib9/fork.c b/src/lib9/fork.c
new file mode 100644
index 00000000..99e84dc9
--- /dev/null
+++ b/src/lib9/fork.c
@@ -0,0 +1,14 @@
+#include <u.h>
+#include <libc.h>
+#include "9proc.h"
+#undef fork
+
+int
+p9fork(void)
+{
+	int pid;
+
+	pid = fork();
+	_p9uproc(0);
+	return pid;
+}