diff --git a/libs/ardour/MSVClibardour/ardour.vcproj b/libs/ardour/MSVClibardour/ardour.vcproj
index b22822eea5..9b72773188 100644
--- a/libs/ardour/MSVClibardour/ardour.vcproj
+++ b/libs/ardour/MSVClibardour/ardour.vcproj
@@ -1211,6 +1211,10 @@
 				RelativePath="..\sha1.c"
 				>
 			</File>
+			<File
+				RelativePath="..\sidechain.cc"
+				>
+			</File>
 			<File
 				RelativePath="..\slave.cc"
 				>
@@ -2201,6 +2205,10 @@
 				RelativePath="..\ardour\session_utils.h"
 				>
 			</File>
+			<File
+				RelativePath="..\ardour\sidechain.h"
+				>
+			</File>
 			<File
 				RelativePath="..\ardour\silentfilesource.h"
 				>