diff --git a/docs/latex/wx/docmanag.tex b/docs/latex/wx/docmanag.tex
index 83b22df2e5..c1d1161a07 100644
--- a/docs/latex/wx/docmanag.tex
+++ b/docs/latex/wx/docmanag.tex
@@ -277,6 +277,9 @@ Copies a suitable default name into {\it buf}. This is implemented by
 appending an integer counter to the string {\bf unnamed} and incrementing
 the counter.
 
+\perlnote{In wxPerl this function must return the modified name rather
+than just modifying the argument.}
+
 \membersection{wxDocManager::OnCreateFileHistory}
 
 \func{wxFileHistory *}{OnCreateFileHistory}{\void}
diff --git a/docs/latex/wx/document.tex b/docs/latex/wx/document.tex
index bb02ed455c..eb2c774a2d 100644
--- a/docs/latex/wx/document.tex
+++ b/docs/latex/wx/document.tex
@@ -161,6 +161,9 @@ Copies a suitable document name into the supplied {\it name} buffer. The default
 function uses the title, or if there is no title, uses the filename; or if no
 filename, the string {\bf unnamed}. 
 
+\perlnote{In wxPerl this function must return the modified name rather
+than just modifying the argument.}
+
 \membersection{wxDocument::GetTitle}
 
 \constfunc{wxString}{GetTitle}{\void}