diff --git a/serialize.h b/serialize.h
index 147c605..7266b29 100644
--- a/serialize.h
+++ b/serialize.h
@@ -104,6 +104,7 @@
 #ifdef _MSC_VER
 #pragma warning( disable : 4127 )
 #pragma warning( disable : 4244 )
+#include <malloc.h>
 #endif // #ifdef _MSC_VER
 
 #include <stdint.h>