diff --git a/scripts/contributors.sh b/scripts/contributors.sh
index a3a11d5243..f43f91d446 100755
--- a/scripts/contributors.sh
+++ b/scripts/contributors.sh
@@ -62,7 +62,7 @@ CURLWWW="${CURLWWW:-../curl-www}"
       git -C "$CURLWWW" log --pretty=full --use-mailmap "$start..HEAD"
     fi
   } | \
-  grep -Eai '(^Author|^Commit|^ +[a-z-]+-by|^ +Credits-to):' | \
+  grep -Eai '(^Author|^Commit|^ +[a-z-]+-(by|to)):' | \
   cut -d: -f2- | \
   cut '-d(' -f1 | \
   cut '-d<' -f1 | \
diff --git a/scripts/contrithanks.sh b/scripts/contrithanks.sh
index 85f382b755..cea98976f5 100755
--- a/scripts/contrithanks.sh
+++ b/scripts/contrithanks.sh
@@ -62,7 +62,7 @@ tail -n +7 ./docs/THANKS | sed 's/ github/ github/i'  > $rand
       git -C "$CURLWWW" log --use-mailmap "$start..HEAD"
     fi
   } | \
-  grep -Eai '(^Author|^Commit|^ +[a-z-]+-by|^ +Credits-to):' | \
+  grep -Eai '(^Author|^Commit|^ +[a-z-]+-(by|to)):' | \
   cut -d: -f2- | \
   cut '-d(' -f1 | \
   cut '-d<' -f1 | \