diff --git a/client/version.C b/client/version.C
index 6c6fd958e2..e1b66afc7b 100644
--- a/client/version.C
+++ b/client/version.C
@@ -18,6 +18,7 @@
 //
 
 #include "version.h"
+#include "windows_cpp.h"
 
 int gversion = VERSION;
 char* gplatform_name = HOSTTYPE;