diff --git a/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/CGAL/Segment_Delaunay_graph_filtered_traits_2.h b/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/CGAL/Segment_Delaunay_graph_filtered_traits_2.h
index eabca2b1001..d80d75dea8f 100644
--- a/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/CGAL/Segment_Delaunay_graph_filtered_traits_2.h
+++ b/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/CGAL/Segment_Delaunay_graph_filtered_traits_2.h
@@ -191,7 +191,7 @@ whereas the second requires the exact evaluation of signs of ring-type
 expressions, i.e., expressions involving only additions, subtractions 
 and multiplications. Finally, in order to get exact constructions 
 `CM` must be set to `Field_with_sqrt_tag` and the number type 
-in `CK` must support operations involing divisions and square 
+in `CK` must support operations involving divisions and square 
 roots (as well as the other three basic operations of course). 
 The way the predicates are evaluated is discussed in 
 \cgalCite{b-ecvdl-96} and \cgalCite{cgal:k-reisv-04} (the geometric filtering 
diff --git a/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/Segment_Delaunay_graph_2.txt b/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/Segment_Delaunay_graph_2.txt
index d16811be5e6..96826d7cef1 100644
--- a/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/Segment_Delaunay_graph_2.txt
+++ b/Segment_Delaunay_graph_2/doc/Segment_Delaunay_graph_2/Segment_Delaunay_graph_2.txt
@@ -412,7 +412,7 @@ segment Delaunay graphs:
 <LI>The user can define his/her kernel using as number type, a
 number type of the form `Filtered_exact<CT,ET>`. Then this
 kernel can be entered as the first template parameter in the
-`Segment_Delaunay_graph_2<K,MTag>`.
+`Segment_Delaunay_graph_traits_2<K,MTag>`.
 <LI>The user can define up to three different kernels `CK`,
 `FK` and `EK` (default values are provided for most
 parameters). The first kernel `CK` is used only for
@@ -431,7 +431,7 @@ values of the template parameters, the second method for arithmetic
 filtering is more efficient among the two.
 
 Let's consider once more the class
-`Segment_Delaunay_graph_2<K,MTag>`.
+`Segment_Delaunay_graph_traits_2<K,MTag>`.
 The template parameter `MTag` provides another degree of freedom
 to the user, who can indicate the type of arithmetic operations to
 be used in the evaluation of the predicates. More specifically,