diff --git a/packaging/windows/OpenRA.nsi b/packaging/windows/OpenRA.nsi
index e334060e87..1493db3d1c 100644
--- a/packaging/windows/OpenRA.nsi
+++ b/packaging/windows/OpenRA.nsi
@@ -82,6 +82,7 @@ Section "Client" Client
 	File "${SRCDIR}\OpenRA.Renderer.Gl.dll"
 	File "${SRCDIR}\OpenRA.Renderer.Cg.dll"
 	File "${SRCDIR}\OpenRA.Renderer.Null.dll"
+	File "${SRCDIR}\ICSharpCode.SharpZipLib.dll"
 	File "${SRCDIR}\COPYING"
 	File "${SRCDIR}\HACKING"
 	File "${SRCDIR}\INSTALL"
@@ -273,6 +274,7 @@ Function ${UN}Clean
 	Delete $INSTDIR\OpenRA.Renderer.Gl.dll
 	Delete $INSTDIR\OpenRA.Renderer.Cg.dll
 	Delete $INSTDIR\OpenRA.Renderer.Null.dll
+	Delete $INSTDIR\ICSharpCode.SharpZipLib.dll
 	Delete $INSTDIR\Tao.*.dll
 	Delete $INSTDIR\COPYING
 	Delete $INSTDIR\HACKING