diff --git a/thefuck/rules/git_flag_after_filename.py b/thefuck/rules/git_flag_after_filename.py
index c6b0326..78f9391 100644
--- a/thefuck/rules/git_flag_after_filename.py
+++ b/thefuck/rules/git_flag_after_filename.py
@@ -14,7 +14,7 @@ def get_new_command(command):
     command_parts = command.script_parts[:]
 
     # find the bad flag
-    bad_flag = re.search(error_pattern, command.output).group(1)
+    bad_flag = match(command).group(1)
     bad_flag_index = command_parts.index(bad_flag)
 
     # find the filename