diff --git a/dox/dev_guides/upgrade/upgrade.md b/dox/dev_guides/upgrade/upgrade.md
index 0e76b64c02..44472210ce 100644
--- a/dox/dev_guides/upgrade/upgrade.md
+++ b/dox/dev_guides/upgrade/upgrade.md
@@ -1038,7 +1038,7 @@ Flags *Graphic3d_TMF_PanPers* and *Graphic3d_TMF_FullPers* have been removed.
 Several transformation persistence methods in *PrsMgr_PresentableObject* have been marked deprecated.
 Transformation persistence should be defined using  *Graphic3d_TransformPers* constructor directly and passed by a handle, not value.
 
-@subsection_upgrade_710_selprops Dynamic highlight and selection properties
+@subsection upgrade_710_selprops Dynamic highlight and selection properties
 
 Release 7.1.0 introduces *Graphic3d_HighlightStyle* - an entity that allows flexible customization of highlighting parameters (such as highlighting method, color, and transparency). Therefore, the signatures of the following methods related to highlighting:
 - *AIS_InteractiveContext::Hilight()*;
diff --git a/src/BOPAlgo/BOPAlgo_Section.hxx b/src/BOPAlgo/BOPAlgo_Section.hxx
index 482084fe61..ca52f93467 100644
--- a/src/BOPAlgo/BOPAlgo_Section.hxx
+++ b/src/BOPAlgo/BOPAlgo_Section.hxx
@@ -27,7 +27,7 @@ class TopoDS_Shape;
 
 
 
-//! The algorithm to build a Secton between the arguments.
+//! The algorithm to build a Section between the arguments.
 //! The Section consists of vertices and edges.
 //! The Section contains:
 //! 1. new vertices that are subjects of V/V, E/E, E/F, F/F interferences