diff --git a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
index 25405d2ff3..db67ba8a93 100644
--- a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
+++ b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
@@ -165,8 +165,12 @@ castellatedMeshControls
         }
     }
 
+    // Feature angle:
+    // - used if min and max refinement level of a surface differ
+    // - used if feature snapping (see snapControls below) is used
     resolveFeatureAngle 30;
 
+
     // Region-wise refinement
     // ~~~~~~~~~~~~~~~~~~~~~~