diff --git a/util/notegrep.sh b/util/notegrep.sh
index cbae2e9..5af5f4d 100644
--- a/util/notegrep.sh
+++ b/util/notegrep.sh
@@ -163,6 +163,8 @@ function notegrep() {
  do_grep
 
  unset GREP_OPTIONS
+ unset -f check_params
+ unset -f do_grep
  cd $DIR
  return 0
 }