diff --git a/run-clang-format.py b/run-clang-format.py
index 395304e..53d7528 100755
--- a/run-clang-format.py
+++ b/run-clang-format.py
@@ -329,7 +329,8 @@ def main():
         extensions=args.extensions.split(','))
 
     if not files:
-        return
+        print_trouble(parser.prog, 'No files found', use_colors=colored_stderr)
+        return ExitStatus.TROUBLE
 
     njobs = args.j
     if njobs == 0: