diff --git a/scripts/check_format.sh b/scripts/check_format.sh
index 75c492331..72840f340 100755
--- a/scripts/check_format.sh
+++ b/scripts/check_format.sh
@@ -122,11 +122,11 @@ fi
 
 echo -n "Checking comment style..."
 
-git grep --line-number -e '/[*][^ *-]' -- '*.[ch]' > comment.log || true
-git grep --line-number -e '[^ ][*]/' -- '*.[ch]' ':!lib/rte_vhost*/*' >> comment.log || true
+git grep --line-number -e '\/[*][^ *-]' -- '*.[ch]' > comment.log || true
+git grep --line-number -e '[^ ][*]\/' -- '*.[ch]' ':!lib/rte_vhost*/*' >> comment.log || true
 git grep --line-number -e '^[*]' -- '*.[ch]' >> comment.log || true
-git grep --line-number -e '\s//' -- '*.[ch]' >> comment.log || true
-git grep --line-number -e '^//' -- '*.[ch]' >> comment.log || true
+git grep --line-number -e '\s\/\/' -- '*.[ch]' >> comment.log || true
+git grep --line-number -e '^\/\/' -- '*.[ch]' >> comment.log || true
 
 if [ -s comment.log ]; then
 	echo " Incorrect comment formatting detected"