diff --git a/src/OSSupport_Win32.cpp b/src/OSSupport_Win32.cpp
index a1fe52a..1c506ae 100644
--- a/src/OSSupport_Win32.cpp
+++ b/src/OSSupport_Win32.cpp
@@ -20,6 +20,7 @@
 //////////////////////////////////////////////////////////////////////////////////
 
 //Win32 API
+#define PSAPI_VERSION 1
 #define WIN32_LEAN_AND_MEAN 1
 #include <Windows.h>
 #include <Psapi.h>