diff --git a/NumLib/DOF/LocalToGlobalIndexMap.cpp b/NumLib/DOF/LocalToGlobalIndexMap.cpp
index 4fca442cdfeb884e8c211c6d4676ffe3b168f54e..e79c3b0cbf261b8f64bad9cac68a6b5d59c5e503 100644
--- a/NumLib/DOF/LocalToGlobalIndexMap.cpp
+++ b/NumLib/DOF/LocalToGlobalIndexMap.cpp
@@ -204,7 +204,7 @@ LocalToGlobalIndexMap::LocalToGlobalIndexMap(
       _mesh_component_map(std::move(mesh_component_map)),
       _variable_component_offsets(to_cumulative(std::vector<unsigned>(1,1))) // Single variable only.
 {
-    // There is only on mesh_subsets in the vector _mesh_subsets.
+    // There is only one mesh_subsets in the vector _mesh_subsets.
     assert(_mesh_subsets.size() == 1);
     auto const mss = *_mesh_subsets.front();