diff --git a/bumblebee/engine.py b/bumblebee/engine.py
index 07345cd..922ff70 100644
--- a/bumblebee/engine.py
+++ b/bumblebee/engine.py
@@ -7,6 +7,7 @@ import argparse
 import importlib
 import bumblebee.theme
 import bumblebee.output
+import bumblebee.modules
 
 class Arguments:
     def __init__(self):