diff --git a/client/mac_address.cpp b/client/mac_address.cpp
index 7b5a8b6f7a..fd8be80834 100644
--- a/client/mac_address.cpp
+++ b/client/mac_address.cpp
@@ -21,7 +21,7 @@
 #include <string.h>
 
 #if defined(_WIN32)
-#include <windows.h>
+#include <boinc_win.h>
 #include <Iphlpapi.h>
 #elif defined(__APPLE__)
 #include <cstdio>