diff --git a/hooks/commit-msg b/hooks/commit-msg
index 70d67ea..92fdc54 100755
--- a/hooks/commit-msg
+++ b/hooks/commit-msg
@@ -51,7 +51,7 @@
 
 # Avoid the --in-place option which only appeared in Git 2.8
 # Avoid the --if-exists option which only appeared in Git 2.15
-if ! git -c trailer.ifexists=doNothing interpret-trailers \
+if ! git -c trailer.ifexists=doNothing interpret-trailers --where start \
       --trailer "Change-Id: I${random}" < "$1" > "${dest}" ; then
   echo "cannot insert change-id line in $1"
   exit 1