diff --git a/win_build/updater.vcproj b/win_build/updater.vcproj
index dc671ca697..f82b01d42e 100644
--- a/win_build/updater.vcproj
+++ b/win_build/updater.vcproj
@@ -679,10 +679,6 @@
 			Name="Source Files"
 			Filter="cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
 			>
-			<File
-				RelativePath="..\client\sandbox.C"
-				>
-			</File>
 			<File
 				RelativePath="..\tools\updater.C"
 				>