diff --git a/scripts/assets.py b/scripts/assets.py
index 9b30224..d40b1bb 100644
--- a/scripts/assets.py
+++ b/scripts/assets.py
@@ -307,7 +307,7 @@ def stitch_sprites(metadata, filename_base):
   json_filename = os.path.expanduser(filename_base) + '.js'
   print('saving json to', json_filename)
   with open(json_filename, 'w') as json_file:
-    json_file.write(' const spritesheet_json = ')
+    json_file.write('const spritesheet_json = ')
     json.dump(output_json, json_file, sort_keys=True, indent=2)
     json_file.write(';')