diff --git a/thefuck/rules/brew_unknown_command.py b/thefuck/rules/brew_unknown_command.py
index 6664d8e8..26c0924f 100644
--- a/thefuck/rules/brew_unknown_command.py
+++ b/thefuck/rules/brew_unknown_command.py
@@ -12,7 +12,8 @@ TAP_CMD_PATH = '/%s/%s/cmd'
 def _get_brew_path_prefix():
     """To get brew path"""
     try:
-        return subprocess.check_output(['brew', '--prefix']).strip()
+        return subprocess.check_output(['brew', '--prefix'],
+                                       universal_newlines=True).strip()
     except:
         return None