diff --git a/modules/git_webhooks/__init__.py b/modules/git_webhooks/__init__.py
index 44d9b5dc..bf412860 100644
--- a/modules/git_webhooks/__init__.py
+++ b/modules/git_webhooks/__init__.py
@@ -228,6 +228,9 @@ class Module(ModuleManager.BaseModule):
             if existing_hook:
                 raise utils.EventError("There's already a hook for %s" %
                     hook_name)
+            if hook_name == None:
+                command = "%s%s" % (event["command_prefix"], event["command"])
+                raise utils.EventError("Not enough arguments (Usage: %s add <hook>)" % command)
 
             all_hooks[hook_name] = {
                 "events": DEFAULT_EVENT_CATEGORIES.copy(),