diff --git a/scripts/contrithanks.sh b/scripts/contrithanks.sh
index f60961762c..2afc30c244 100755
--- a/scripts/contrithanks.sh
+++ b/scripts/contrithanks.sh
@@ -70,4 +70,4 @@ cat ./docs/THANKS
 } | \
 sed -f ./docs/THANKS-filter | \
 sort -fu | \
-grep -aixvf ./docs/THANKS
+grep -aixvFf ./docs/THANKS