diff --git a/relational/relation.py b/relational/relation.py
index 6191713..6bc5d7f 100644
--- a/relational/relation.py
+++ b/relational/relation.py
@@ -489,7 +489,6 @@ class Header(tuple):
     '''This class defines the header of a relation.
     It is used within relations to know if requested operations are accepted'''
 
-    # Since relations are mutalbe we explicitly block hashing them
     def __new__(cls, fields):
         return super(Header, cls).__new__(cls, tuple(fields))