diff --git a/cd/__init__.py b/cd/__init__.py
index 4795a81..17399ce 100644
--- a/cd/__init__.py
+++ b/cd/__init__.py
@@ -4,8 +4,8 @@ COMMANDS_PREFIX = 'cd-'
 
 
 def cd_list_environment():
-    for variable, value in os.environ.items():
-        print(variable, value)
+    for variable, value in sorted(os.environ.items()):
+        print(variable, '=', value)
 
 
 def install_commands(path):