diff --git a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
index dd523164ea..cc975eb970 100644
--- a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
+++ b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
@@ -323,9 +323,10 @@ meshQualityControls
     minTriangleTwist -1;
 
     //- if >0 : preserve single cells with all points on the surface if the
-    //  resulting volume after snapping (approximation) is larger than
-    //  minVolFraction times old volume. If <0 : delete always.
-    minVolFraction 0.5;
+    //  resulting volume after snapping (by approximation) is larger than
+    //  minVolCollapseRatio times old volume (i.e. not collapsed to flat cell).
+    //  If <0 : delete always.
+    //minVolCollapseRatio 0.5;
 
 
     // Advanced
diff --git a/src/autoMesh/autoHexMesh/meshRefinement/meshRefinementProblemCells.C b/src/autoMesh/autoHexMesh/meshRefinement/meshRefinementProblemCells.C
index 5f3e335d60..ea1e8a083c 100644
--- a/src/autoMesh/autoHexMesh/meshRefinement/meshRefinementProblemCells.C
+++ b/src/autoMesh/autoHexMesh/meshRefinement/meshRefinementProblemCells.C
@@ -524,9 +524,9 @@ Foam::labelList Foam::meshRefinement::markFacesOnProblemCells
 
     // Collapse checking parameters
     scalar volFraction = -1;
-    if (motionDict.found("minVolFraction"))
+    if (motionDict.found("minVolCollapseRatio"))
     {
-        volFraction = readScalar(motionDict.lookup("minVolFraction"));
+        volFraction = readScalar(motionDict.lookup("minVolCollapseRatio"));
     }
     const bool checkCollapse = (volFraction > 0);
     scalar minArea = -1;
diff --git a/src/autoMesh/autoHexMesh/refinementSurfaces/refinementSurfaces.H b/src/autoMesh/autoHexMesh/refinementSurfaces/refinementSurfaces.H
index 2c6fbbe8f2..e8fd361401 100644
--- a/src/autoMesh/autoHexMesh/refinementSurfaces/refinementSurfaces.H
+++ b/src/autoMesh/autoHexMesh/refinementSurfaces/refinementSurfaces.H
@@ -154,7 +154,7 @@ public:
                 return cellZoneNames_;
             }
 
-            //- Get indices of named surfaces (surfaces with faceZoneName)
+            //- Get indices of unnamed surfaces (surfaces without faceZoneName)
             labelList getUnnamedSurfaces() const;
 
             //- Get indices of named surfaces (surfaces with faceZoneName)