diff --git a/thefuck/main.py b/thefuck/main.py
index 454b4d2..3872175 100644
--- a/thefuck/main.py
+++ b/thefuck/main.py
@@ -52,8 +52,9 @@ def main():
     elif known_args.command:
         fix_command(known_args)
     elif known_args.alias:
-        warn("The Fuck will drop Python 2 support soon, more details "
-             "https://github.com/nvbn/thefuck/issues/685")
+        if six.PY2:
+            warn("The Fuck will drop Python 2 support soon, more details "
+                 "https://github.com/nvbn/thefuck/issues/685")
 
         if known_args.enable_experimental_instant_mode:
             if six.PY2: