diff --git a/stdlib/public/stubs/LibcShims.cpp b/stdlib/public/stubs/LibcShims.cpp
index 0e13e2c85b71e..b5e39f5d05df5 100644
--- a/stdlib/public/stubs/LibcShims.cpp
+++ b/stdlib/public/stubs/LibcShims.cpp
@@ -23,6 +23,7 @@
 #endif
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "swift/shims/LibcShims.h"