diff --git a/libs/ardour/MSVClibardour/ardour.vcproj b/libs/ardour/MSVClibardour/ardour.vcproj
index 69bf963fba..e0aafe9f27 100644
--- a/libs/ardour/MSVClibardour/ardour.vcproj
+++ b/libs/ardour/MSVClibardour/ardour.vcproj
@@ -559,6 +559,10 @@
 				RelativePath="..\find_session.cc"
 				>
 			</File>
+			<File
+				RelativePath="..\gain_control.cc"
+				>
+			</File>
 			<File
 				RelativePath="..\globals.cc"
 				>
@@ -1649,6 +1653,10 @@
 				RelativePath="..\ardour\filter.h"
 				>
 			</File>
+			<File
+				RelativePath="..\ardour\gain_control.h"
+				>
+			</File>
 			<File
 				RelativePath="..\ardour\graph.h"
 				>