diff --git a/libavutil/x86/bswap.h b/libavutil/x86/bswap.h
index ffa59e4c82..b2f18b6c93 100644
--- a/libavutil/x86/bswap.h
+++ b/libavutil/x86/bswap.h
@@ -26,6 +26,7 @@
 
 #include <stdint.h>
 #if defined(_MSC_VER)
+#include <stdlib.h>
 #include <intrin.h>
 #endif
 #include "config.h"