diff --git a/scrapy/command/cmdline.py b/scrapy/command/cmdline.py
index b091c7d06..55c85b468 100644
--- a/scrapy/command/cmdline.py
+++ b/scrapy/command/cmdline.py
@@ -145,3 +145,6 @@ def run_command(cmd, args, opts):
     else:
         ret = cmd.run(args, opts)
     return ret
+
+if __name__ == '__main__':
+    execute()