diff --git a/thefuck/rules/sudo.py b/thefuck/rules/sudo.py
index 18de2001..8ab211c9 100644
--- a/thefuck/rules/sudo.py
+++ b/thefuck/rules/sudo.py
@@ -11,6 +11,9 @@ patterns = ['permission denied',
             'requested operation requires superuser privilege',
             'must be run as root',
             'must be superuser',
+            'must be root',
+            # wow, case-sensitive
+            'need to be root',
             'Need to be root',
             'you must be root to run this program.',
             'only root can do that']