diff --git a/cd/__init__.py b/cd/__init__.py
index de206f7..9b1fdd9 100644
--- a/cd/__init__.py
+++ b/cd/__init__.py
@@ -3,7 +3,7 @@ import os
 COMMANDS_PREFIX = 'cd-'
 
 
-def cd_list_environment:
+def cd_list_environment():
     for variable, value in os.environ:
         print(variable, value)