diff --git a/.hooks/pre-commit.d/check_files b/.hooks/pre-commit.d/check_files
index 01eae4f2b3d8..e9891f3cc827 100755
--- a/.hooks/pre-commit.d/check_files
+++ b/.hooks/pre-commit.d/check_files
@@ -1,30 +1,30 @@
 #!/bin/sh
 #
 # Check that only standard files are added to a port
 #
 #    .*\.mk
 #    Makefile.*
 #    distinfo.*
 #    pkg-.*
 #
 
 category_regex="($(make -VSUBDIR | sed 's# #\|#g'))"
 newish_files=$(git diff --name-only --cached --diff-filter=ACR | grep -E "^${category_regex}/[^/]+/[^/]+$")
 
 status=0
 if [ $? -eq 0 ] ; then
 	for newish_file in ${newish_files} ; do
 		category=$(echo "${newish_file}" | awk -F '/' '{print $1}')
 		port=$(echo "${newish_file}" | awk -F '/' '{print $2}')
 		file=$(echo "${newish_file}" | awk -F '/' '{print $3}')
-		valid=$(echo "${file}" | grep -q '^((Makefile|distinfo|pkg-)(.*))|(.*\.mk)$')
+		valid=$(echo "${file}" | grep -Eq '^((Makefile|distinfo|pkg-)(.*))|(.*\.mk)$')
 		if [ $? -ne 0 ] ; then
 			echo "[pre-commit] ERROR: invalid file '${file}' in '${category}/${port}'"
 			status=1
 		fi
 	done
 fi
 if [ ${status} -eq 1 ] ; then
 	echo "             Consider moving non-standard files to files/ or force-ignore this hook."
 	exit 1
 fi