diff --git a/Surface_mesh_simplification/doc/Surface_mesh_simplification/Concepts/GetFilter.h b/Surface_mesh_simplification/doc/Surface_mesh_simplification/Concepts/GetFilter.h
index 8c18887f004..3e790a19f6f 100644
--- a/Surface_mesh_simplification/doc/Surface_mesh_simplification/Concepts/GetFilter.h
+++ b/Surface_mesh_simplification/doc/Surface_mesh_simplification/Concepts/GetFilter.h
@@ -3,9 +3,7 @@
 \cgalConcept
 
 The concept `GetFilter` describes the requirements for the <I>policy
-function object</I> which gets the <I>collapse placement</I> of an edge,
-that is, the new position of the vertex that remains after a
-halfedge-collapse operation.
+function object</I> which gets the profile and placement of an edge.
 
 The placement returned is a `boost::optional` value (i.e., it can
 be absent). The value `boost::none` indicates that the edge should not be collapsed.
@@ -36,4 +34,4 @@ public:
 
   /// @}
 
-}; /* end GetPlacement */
+}; /* end Filter */
diff --git a/Surface_mesh_simplification/doc/Surface_mesh_simplification/Surface_mesh_simplification.txt b/Surface_mesh_simplification/doc/Surface_mesh_simplification/Surface_mesh_simplification.txt
index 149bc59a8a6..dff0d95714c 100644
--- a/Surface_mesh_simplification/doc/Surface_mesh_simplification/Surface_mesh_simplification.txt
+++ b/Surface_mesh_simplification/doc/Surface_mesh_simplification/Surface_mesh_simplification.txt
@@ -215,7 +215,7 @@ On the one hand, this dramatically saves on memory but on the other hand is
 a processing waste because when an edge is effectively collapsed, `GetPlacement`
 must be called <I>again</I> to know were to move the remaining vertex.
 
-Earlier prototypes shown that attaching the placement to the edge, thus avoiding one
+Earlier prototypes showed that attaching the placement to the edge, thus avoiding one
 redundant call to the placement function after the edge collapsed, has little
 impact on the total running time. This is because the cost of an each edge is not just
 computed once but changes several times during the process so the placement function