diff --git a/docs/latex/wx/config.tex b/docs/latex/wx/config.tex
index 82e3e7938c..6b0a17449d 100644
--- a/docs/latex/wx/config.tex
+++ b/docs/latex/wx/config.tex
@@ -199,6 +199,7 @@ explicitly.
 Having said all this, enumerating the config entries/groups is very simple:
 
 \begin{verbatim}
+  wxConfigBase *config = ...;
   wxArrayString aNames;
 
   // enumeration variables