diff --git a/cmake/regex_check.sh b/cmake/regex_check.sh
index d79fbbf..63b7e32 100755
--- a/cmake/regex_check.sh
+++ b/cmake/regex_check.sh
@@ -12,6 +12,7 @@ SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
 "$SCRIPT_DIR/../cicd/style/regex_check.sh" \
 	-e '^build[^/]*/' \
 	-e '^.*\.svg$' \
+	-r '(^$)|(^.*[^[:cntrl:][:blank:]]$)' \
 	"$SCRIPT_DIR/.."
 "$SCRIPT_DIR/../cicd/style/regex_check.sh" \
 	-e '^build[^/]*/' \