diff --git a/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj b/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj
index 8e9fa30fdf..9e61bd4689 100644
--- a/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj
+++ b/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj
@@ -381,6 +381,10 @@
 				RelativePath="..\keyboard.cc"
 				>
 			</File>
+			<File
+				RelativePath="..\pane.cc"
+				>
+			</File>
 			<File
 				RelativePath="..\paths_dialog.cc"
 				>
@@ -607,6 +611,10 @@
 				RelativePath="..\gtkmm2ext\keyboard.h"
 				>
 			</File>
+			<File
+				RelativePath="..\gtkmm2ext\pane.h"
+				>
+			</File>
 			<File
 				RelativePath="..\gtkmm2ext\persistent_tooltip.h"
 				>