diff --git a/unstack.sh b/unstack.sh
index 813f9a8117..a36af3fb59 100755
--- a/unstack.sh
+++ b/unstack.sh
@@ -185,4 +185,4 @@ rm -Rf $DEST/async
 # Clean any safe.directory items we wrote into the global
 # gitconfig. We can identify the relevant ones by checking that they
 # point to somewhere in our $DEST directory.
-sudo sed -i "/directory=${DEST}/ d" /etc/gitconfig
+sudo sed -i "\+directory = ${DEST}+ d" /etc/gitconfig