diff --git a/builds/win32/msvc9/yvalve.vcproj b/builds/win32/msvc9/yvalve.vcproj
index 7dd4ee0859..b81325b228 100644
--- a/builds/win32/msvc9/yvalve.vcproj
+++ b/builds/win32/msvc9/yvalve.vcproj
@@ -352,6 +352,10 @@
 				RelativePath="..\..\..\src\yvalve\alt_proto.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\..\src\plugins\crypt\arc4\Arc4.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\..\src\yvalve\array_proto.h"
 				>
@@ -432,6 +436,10 @@
 				RelativePath="..\..\..\src\yvalve\alt.cpp"
 				>
 			</File>
+			<File
+				RelativePath="..\..\..\src\plugins\crypt\arc4\Arc4.cpp"
+				>
+			</File>
 			<File
 				RelativePath="..\..\..\src\yvalve\DistributedTransaction.cpp"
 				>