diff --git a/include/asterisk/frame.h b/include/asterisk/frame.h
index 7331746bb18d720fa6f9bcce6fba873c7e7ae614..6323854b4dfb46cd6dde86f37dc07b7fd2532118 100644
--- a/include/asterisk/frame.h
+++ b/include/asterisk/frame.h
@@ -50,7 +50,7 @@ struct ast_codec_pref {
 	\arg \b IMAGE:	Image transport, mostly used in IAX
 	\arg \b TEXT:	Text messages
 	\arg \b HTML:	URL's and web pages
-	\arg \b T38:	T38 Fax transport frames
+	\arg \b MODEM:	Modulated data encodings, such as T.38 and V.150
 	\arg \b IAX:	Private frame type for the IAX protocol
 	\arg \b CNG:	Comfort noice frames
 	\arg \b CONTROL:	A control frame, subclass defined as AST_CONTROL_