diff --git a/.github/scripts/codeql-matrix.sh b/.github/scripts/codeql-matrix.sh
index cfbe3b8a..1da56115 100644
--- a/.github/scripts/codeql-matrix.sh
+++ b/.github/scripts/codeql-matrix.sh
@@ -7,7 +7,7 @@ java_build_mode="${1:-autobuild}"
 matrix_entries=""
 
 has_files() {
-    git ls-files "$@" | grep -q .
+    git ls-files "$@" | grep . >/dev/null
 }
 
 add_entry() {