diff --git a/libs/ardour/MSVClibardour/ardour.vcproj b/libs/ardour/MSVClibardour/ardour.vcproj
index d1c7435f23..9826d88684 100644
--- a/libs/ardour/MSVClibardour/ardour.vcproj
+++ b/libs/ardour/MSVClibardour/ardour.vcproj
@@ -1493,6 +1493,10 @@
 				RelativePath="..\ardour\beats_frames_converter.h"
 				>
 			</File>
+			<File
+				RelativePath="..\ardour\boost_debug.h"
+				>
+			</File>
 			<File
 				RelativePath="..\ardour\broadcast_info.h"
 				>