diff --git a/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj b/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj
index 3fe0f7e3d8..6d31ddad7d 100644
--- a/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj
+++ b/libs/gtkmm2ext/MSVCgtkmm2ext/gtkmm2ext.vcproj
@@ -261,6 +261,10 @@
 			Filter="cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx"
 			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}"
 			>
+			<File
+				RelativePath="..\action_model.cc"
+				>
+			</File>
 			<File
 				RelativePath="..\actions.cc"
 				>
@@ -375,6 +379,10 @@
 			Filter="h;hpp;hxx;hm;inl;inc;xsd"
 			UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}"
 			>
+			<File
+				RelativePath="..\gtkmm2ext\action_model.h"
+				>
+			</File>
 			<File
 				RelativePath="..\gtkmm2ext\actions.h"
 				>