diff --git a/libs/ardour/ardour/buffer_set.h b/libs/ardour/ardour/buffer_set.h
index 34e26d5b3a..a8c10fbf27 100644
--- a/libs/ardour/ardour/buffer_set.h
+++ b/libs/ardour/ardour/buffer_set.h
@@ -189,7 +189,7 @@ private:
 	LV2Buffers _lv2_buffers;
 #endif
 
-#if defined VST_SUPPORT || defined LXVST_SUPPORT
+#if defined WINDOWS_VST_SUPPORT || defined LXVST_SUPPORT
 	class VSTBuffer {
 	public:
 		VSTBuffer (size_t);