diff --git a/Code/lsgrmGraphOperations.txx b/Code/lsgrmGraphOperations.txx
index ada54a32f63c49b9883be90ff5f5869c15a34d72..be32e32641639ac57d109738b10d4d405723cb42 100644
--- a/Code/lsgrmGraphOperations.txx
+++ b/Code/lsgrmGraphOperations.txx
@@ -51,6 +51,7 @@ namespace lsgrm
 		if (myrank == 0)
 		  std::cout << "\nRemoving duplicated nodes and updating neighbors..." << std::endl;
 
+		// TODO this might be parallelized...
 		for(unsigned int row = 0; row < nbTilesY; ++row)
 		{
 			for(unsigned int col = 0; col < nbTilesX; col++)