diff --git a/interface/wx/bookctrl.h b/interface/wx/bookctrl.h
index dc775d00a6..31a2120c70 100644
--- a/interface/wx/bookctrl.h
+++ b/interface/wx/bookctrl.h
@@ -279,7 +279,13 @@ public:
 
     /**
         Deletes the specified page, and the associated window.
-        The call to this function generates the page changing events.
+
+        The call to this function generates the page changing events when
+        deleting the currently selected page or a page preceding it in the
+        index order, but it does @e not send any events when deleting the last
+        page: while in this case the selection also changes, it becomes invalid
+        and for compatibility reasons the control never generates events with
+        the invalid selection index.
     */
     virtual bool DeletePage(size_t page);
 
@@ -311,6 +317,9 @@ public:
 
     /**
         Deletes the specified page, without deleting the associated window.
+
+        See DeletePage() for a note about the events generated by this
+        function.
     */
     virtual bool RemovePage(size_t page);