diff --git a/src/Propellor/CmdLine.hs b/src/Propellor/CmdLine.hs
index 22e0c3f..2f41f0c 100644
--- a/src/Propellor/CmdLine.hs
+++ b/src/Propellor/CmdLine.hs
@@ -303,7 +303,7 @@ boot = do
 		hout <- dup stdOutput
 		hClose stdin
 		hClose stdout
-		unlessM (boolSystem "git" [Param "pull", Param "--upload=pack", Param $ "sh -c ./propellor --gitpush " ++ show hin ++ " " ++ show hout, Param "."]) $
+		unlessM (boolSystem "git" [Param "pull", Param "--upload-pack", Param $ "sh -c ./propellor --gitpush " ++ show hin ++ " " ++ show hout, Param "."]) $
 			warningMessage "git pull from client failed"
 
 -- Shim for git push over the propellor ssh channel.