diff --git a/activerecord/lib/active_record/associations/singular_association.rb b/activerecord/lib/active_record/associations/singular_association.rb
index 32f4557c28986ebe2452a6d957b643d7c4ddfa50..10238555f033354f35defec3b00623ff84413d5d 100644
--- a/activerecord/lib/active_record/associations/singular_association.rb
+++ b/activerecord/lib/active_record/associations/singular_association.rb
@@ -12,7 +12,7 @@ def reader(force_reload = false)
         target
       end
 
-      # Implements the writer method, e.g. foo.items= for Foo.has_many :items
+      # Implements the writer method, e.g. foo.bar= for Foo.belongs_to :bar
       def writer(record)
         replace(record)
       end