diff --git a/stepmania/src/StepMania-net2005.vcproj b/stepmania/src/StepMania-net2005.vcproj
index be18236696..0bb908c34d 100644
--- a/stepmania/src/StepMania-net2005.vcproj
+++ b/stepmania/src/StepMania-net2005.vcproj
@@ -2091,6 +2091,22 @@
 					RelativePath=".\archutils\Win32\DialogUtil.h"
 					>
 				</File>
+				<File
+					RelativePath=".\archutils\Win32\DirectXHelpers.cpp"
+					>
+				</File>
+				<File
+					RelativePath=".\archutils\Win32\DirectXHelpers.h"
+					>
+				</File>
+				<File
+					RelativePath=".\archutils\Win32\ErrorStrings.cpp"
+					>
+				</File>
+				<File
+					RelativePath=".\archutils\Win32\ErrorStrings.h"
+					>
+				</File>
 				<File
 					RelativePath="archutils\Win32\GetFileInformation.cpp"
 					>