diff --git a/thefuck/main.py b/thefuck/main.py
index ff0341f..0416508 100644
--- a/thefuck/main.py
+++ b/thefuck/main.py
@@ -5,6 +5,7 @@ init_output()
 
 from pprint import pformat  # noqa: E402
 import sys  # noqa: E402
+import six  # noqa: E402
 from . import logs, types  # noqa: E402
 from .shells import shell  # noqa: E402
 from .conf import settings  # noqa: E402
@@ -13,6 +14,7 @@ from .exceptions import EmptyCommand  # noqa: E402
 from .ui import select_command  # noqa: E402
 from .argument_parser import Parser  # noqa: E402
 from .utils import get_installation_info  # noqa: E402
+from .logs import warn  # noqa: E402
 
 
 def fix_command(known_args):
@@ -51,7 +53,11 @@ def main():
         fix_command(known_args)
     elif known_args.alias:
         if known_args.enable_experimental_instant_mode:
-            alias = shell.instant_mode_alias(known_args.alias)
+            if six.PY2:
+                warn("Instant mode not supported with Python 2")
+                alias = shell.app_alias(known_args.alias)
+            else:
+                alias = shell.instant_mode_alias(known_args.alias)
         else:
             alias = shell.app_alias(known_args.alias)