diff --git a/docs/latex/wx/treectrl.tex b/docs/latex/wx/treectrl.tex
index e43750d483..48fed6862a 100644
--- a/docs/latex/wx/treectrl.tex
+++ b/docs/latex/wx/treectrl.tex
@@ -1112,7 +1112,8 @@ Returns \true if this instance is referencing a valid tree item.
 
 \constfunc{void}{operator $!$}{}
 
-Synonim for \helpref{IsOk}{wxtreeitemidisok}
+Antonym of \helpref{IsOk}{wxtreeitemidisok}, i.e. returns \true only if the
+item is not valid.
 
 
 \constfunc{bool}{operator $==$}{\param{const wxTreeItemId\& }{item}}