diff --git a/stepmania/src/StepMania-net2003.vcproj b/stepmania/src/StepMania-net2003.vcproj
index c963789cd3..9714441ade 100644
--- a/stepmania/src/StepMania-net2003.vcproj
+++ b/stepmania/src/StepMania-net2003.vcproj
@@ -3510,6 +3510,18 @@ cl /Zl /nologo /c verstub.cpp /Fo"$(IntDir)"\
 			<File
 				RelativePath="Quad.h">
 			</File>
+			<File
+				RelativePath=".\RageSoundReader_Extend.cpp">
+			</File>
+			<File
+				RelativePath=".\RageSoundReader_Extend.h">
+			</File>
+			<File
+				RelativePath=".\RageSoundReader_ThreadedBuffer.cpp">
+			</File>
+			<File
+				RelativePath=".\RageSoundReader_ThreadedBuffer.h">
+			</File>
 			<File
 				RelativePath="RollingNumbers.cpp">
 			</File>