diff --git a/tools/js2c.py b/tools/js2c.py
index 0e82317505d687..1346b2a87046d3 100755
--- a/tools/js2c.py
+++ b/tools/js2c.py
@@ -261,7 +261,7 @@ def NormalizeFileName(filename):
     split = ['internal'] + split
   else:  # `lib/**/*.js` so drop the 'lib' part
     split = split[1:]
-  if split != []:
+  if len(split):
     filename = '/'.join(split)
   return os.path.splitext(filename)[0]