diff --git a/elasticsearch-model/lib/elasticsearch/model/naming.rb b/elasticsearch-model/lib/elasticsearch/model/naming.rb
index 7bf24f089..df9615112 100644
--- a/elasticsearch-model/lib/elasticsearch/model/naming.rb
+++ b/elasticsearch-model/lib/elasticsearch/model/naming.rb
@@ -77,7 +77,7 @@ def implicit(prop)
 
             if Elasticsearch::Model.settings[:inheritance_enabled]
               self.ancestors.each do |klass|
-                next if klass == self
+                next if klass.name == self.name
                 break if value = klass.respond_to?(prop) && klass.send(prop)
               end
             end