diff --git a/staging/commit-rebase.sh b/staging/commit-rebase.sh
index 93e44f1e..a1f21264 100755
--- a/staging/commit-rebase.sh
+++ b/staging/commit-rebase.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
 
-sha=`git -C ./staging/wine/ rev-parse HEAD`
+sha=`git -C ./staging/wine/ rev-parse origin/master`
 echo $sha > ./staging/upstream-commit
 git commit -am "Rebase against $sha."