diff --git a/libs/ardour/ardour/variant.h b/libs/ardour/ardour/variant.h
index 712d559c94..7eccab251f 100644
--- a/libs/ardour/ardour/variant.h
+++ b/libs/ardour/ardour/variant.h
@@ -29,7 +29,7 @@
 #include "ardour/libardour_visibility.h"
 #include "pbd/compose.h"
 
-#ifdef COMPILER_MSVC
+#ifdef PLATFORM_WINDOWS
 #undef VOID
 #endif