diff --git a/source/build/include/compat.h b/source/build/include/compat.h
index c93790490..84cd37779 100644
--- a/source/build/include/compat.h
+++ b/source/build/include/compat.h
@@ -82,7 +82,7 @@
 
 #ifndef UNREFERENCED_CONST_PARAMETER
 # ifdef _MSC_VER
-#  define UNREFERENCED_CONST_PARAMETER(x) (x)
+#  define UNREFERENCED_CONST_PARAMETER(x) ((void)(x))
 # else
 #  define UNREFERENCED_CONST_PARAMETER(x)
 # endif