diff --git a/libc/bionic/clone.cpp b/libc/bionic/clone.cpp
index 3a20aa9..d7ce37f 100644
--- a/libc/bionic/clone.cpp
+++ b/libc/bionic/clone.cpp
@@ -30,6 +30,7 @@
 #include <sched.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <sys/syscall.h>
 
 #include "pthread_internal.h"