diff --git a/lemon/grid_graph.h b/lemon/grid_graph.h
--- a/lemon/grid_graph.h
+++ b/lemon/grid_graph.h
@@ -496,7 +496,7 @@
   /// }
   ///\endcode
   ///
-  /// This graph type is fully conform to the \ref concepts::Graph
+  /// This graph type fully conforms to the \ref concepts::Graph
   /// "Graph" concept, and it also has an important extra feature
   /// that its maps are real \ref concepts::ReferenceMap
   /// "reference map"s.