diff --git a/docs/latex/wx/tex2rtf.ini b/docs/latex/wx/tex2rtf.ini
index 25c9ab6de1..2d85960278 100644
--- a/docs/latex/wx/tex2rtf.ini
+++ b/docs/latex/wx/tex2rtf.ini
@@ -56,6 +56,7 @@ ignoreInput = "ltx.tex"
 \true [0] {{\tt true}}
 \false [0] {{\tt false}}
 \NULL [0] {{\tt NULL}}
+\newsince [1] {This function is new since wxWidgets version #1}
 
 ; make tex2rtf understand \hbox{} macro:
 \hbox [1] {#1}
diff --git a/docs/latex/wx/tex2rtf_css.ini b/docs/latex/wx/tex2rtf_css.ini
index e1cbe2eb32..918d7be758 100644
--- a/docs/latex/wx/tex2rtf_css.ini
+++ b/docs/latex/wx/tex2rtf_css.ini
@@ -57,6 +57,7 @@ htmlStylesheet = "wx.css"
 \true [0] {{\tt true}}
 \false [0] {{\tt false}}
 \NULL [0] {{\tt NULL}}
+\newsince [1] {This function is new since wxWidgets version #1}
 
 ; make tex2rtf understand \hbox{} macro:
 \hbox [1] {#1}