diff --git a/docs/changes.txt b/docs/changes.txt
index f557b8e0ce..f262050a77 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -41,6 +41,8 @@ Changes in behaviour which may result in build errors
   default, you need to set WXWIN_COMPATIBILITY_3_0 to 1 to enable them. Symbols
   deprecated in 2.8 are not available any longer.
 
+- Building with wxUSE_UNICODE=0 is not supported any longer.
+
 - wxMotif and wxGTK1 ports have been removed, please use wxWidgets 3.2 if you
   still need them.