diff --git a/include/Topology/generic/cellmarker.h b/include/Topology/generic/cellmarker.h
index b15be13cae43f81a028656b0ce227453832c832c..c0726efbe733d57734be5f8019bfd8ac6cc35797 100644
--- a/include/Topology/generic/cellmarker.h
+++ b/include/Topology/generic/cellmarker.h
@@ -117,7 +117,7 @@ public:
 
 protected:
 	// protected copy constructor to forbid its usage
-	CellMarkerBase(const CellMarkerGen& cm) : CellMarkerGen(cm.m_map)
+	CellMarkerBase(const CellMarkerGen& cm) : CellMarkerGen(cm.m_map, CELL)
 	{}
 
 public:
diff --git a/include/Topology/map/map3.h b/include/Topology/map/map3.h
index 7daab2f745033b62a917da237593802a305168d2..1e035ca0d714984171db518da22f746369504e8e 100644
--- a/include/Topology/map/map3.h
+++ b/include/Topology/map/map3.h
@@ -236,7 +236,7 @@ public:
 	 */
 	virtual void unsewVolumes(Dart d);
 
-	//! Merge to volume along their common oriented face
+	//! Merge two volumes along their common oriented face
 	/*! @param d a dart of common face
 	 */
 	virtual bool mergeVolumes(Dart d);