diff --git a/scripts/clean-includes b/scripts/clean-includes
index 86944f27fc..8e8420d785 100755
--- a/scripts/clean-includes
+++ b/scripts/clean-includes
@@ -177,9 +177,8 @@ for f in "$@"; do
 done
 
 if [ "$DUPHEAD" = "yes" ] && [ -n "$files" ]; then
-    egrep "^[[:space:]]*#[[:space:]]*include" $files | tr -d '[:blank:]' \
-        | sort | uniq -c | awk '{if ($1 > 1) print $0}'
-    if [ $? -eq 0 ]; then
+    if egrep "^[[:space:]]*#[[:space:]]*include" $files | tr -d '[:blank:]' \
+        | sort | uniq -c | grep -v '^ *1 '; then
         echo "Found duplicate header file includes. Please check the above files manually."
         exit 1
     fi