diff --git a/interface/wx/utils.h b/interface/wx/utils.h
index 12c433a3f3..020d6b5b39 100644
--- a/interface/wx/utils.h
+++ b/interface/wx/utils.h
@@ -58,13 +58,16 @@ enum wxShutdownFlags
 /**
     @class wxWindowDisabler
 
-    This class disables all windows of the application (may be with the
-    exception of one of them) in its constructor and enables them back in its
-    destructor.
+    This class disables all top level windows of the application (maybe with
+    the exception of one of them) in its constructor and enables them back in
+    its destructor.
 
     This is useful when you want to indicate to the user that the application
     is currently busy and cannot respond to user input.
 
+    @note When instantiated, this affects only windows shown on the screen and
+          not already disabled.
+
     @library{wxcore}
     @category{misc}