diff --git a/Visual Studio Projects/PDP10-KL.vcproj b/Visual Studio Projects/PDP10-KL.vcproj
index a22ec22..bc53666 100644
--- a/Visual Studio Projects/PDP10-KL.vcproj	
+++ b/Visual Studio Projects/PDP10-KL.vcproj	
@@ -201,6 +201,10 @@
 				RelativePath="..\PDP10\ka10_pd.c"
 				>
 			</File>
+			<File
+				RelativePath="..\PDP10\kl10_dn.c"
+				>
+			</File>
 			<File
 				RelativePath="..\PDP10\kl10_fe.c"
 				>