diff --git a/alib2graph_data/src/grid/square/SquareGrid4.hpp b/alib2graph_data/src/grid/square/SquareGrid4.hpp
index b4bd713bbbabb25f7078fbadf389cce5b2b66b9e..d25aa635a2ac600e7524c4c4d1786c4a6ec41936 100644
--- a/alib2graph_data/src/grid/square/SquareGrid4.hpp
+++ b/alib2graph_data/src/grid/square/SquareGrid4.hpp
@@ -127,7 +127,7 @@ struct normalize < grid::SquareGrid4 < TCoordinate, TEdge > > {
   }
 };
 
-} // namespace grid
+} // namespace core
 
 // =====================================================================================================================