diff --git a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
index cd7c13d7833918b5386b977d7a7a04aed077c975..92c92d72e5ae9bacad9c7944aa6d79ff119b5dfa 100644
--- a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
+++ b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
@@ -280,11 +280,14 @@ addLayersControls
     nBufferCellsNoExtrude 0;
 
 
-    // Overall max number of layer addition iterations
+    // Overall max number of layer addition iterations. The mesher will exit
+    // if it reaches this number of iterations; possibly with an illegal
+    // mesh.
     nLayerIter 50;
 
     // Max number of iterations after which relaxed meshQuality controls
-    // get used.
+    // get used. Up to nRelaxIter it uses the settings in meshQualityControls,
+    // after nRelaxIter it uses the values in meshQualityControls::relaxed.
     nRelaxedIter 20;
 }