diff --git a/thefuck/shells.py b/thefuck/shells.py
index 973641d..7ac79c8 100644
--- a/thefuck/shells.py
+++ b/thefuck/shells.py
@@ -152,9 +152,9 @@ class Fish(Generic):
     def app_alias(self, fuck):
         return ('function {0} -d "Correct your previous console command"\n'
                 '  set -l exit_code $status\n'
-                '  set -x TF_ALIAS {0}\n'
                 '  set -l fucked_up_command $history[1]\n'
-                '  thefuck $fucked_up_command | read -l unfucked_command\n'
+                '  env TF_ALIAS={0}'
+                '    thefuck $fucked_up_command | read -l unfucked_command\n'
                 '  if [ "$unfucked_command" != "" ]\n'
                 '    eval $unfucked_command\n'
                 '    if test $exit_code -ne 0\n'