diff --git a/libs/ardour/event_type_map.cc b/libs/ardour/event_type_map.cc
index 2b26e169f5..ab6fd26f7e 100644
--- a/libs/ardour/event_type_map.cc
+++ b/libs/ardour/event_type_map.cc
@@ -24,7 +24,7 @@
 #include "ardour/event_type_map.h"
 #include "ardour/parameter_descriptor.h"
 #include "ardour/parameter_types.h"
-#ifdef LV2_Support
+#ifdef LV2_SUPPORT
 #include "ardour/uri_map.h"
 #endif
 #include "evoral/Parameter.hpp"