diff --git a/stdlib/public/stubs/LibcShims.cpp b/stdlib/public/stubs/LibcShims.cpp
index 4c6e29e2a64b3..0e13e2c85b71e 100644
--- a/stdlib/public/stubs/LibcShims.cpp
+++ b/stdlib/public/stubs/LibcShims.cpp
@@ -17,6 +17,7 @@
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
 #include <io.h>
+#include <stdlib.h>
 #define WIN32_LEAN_AND_MEAN
 #include <Windows.h>
 #endif