diff --git a/libs/sofia-sip/.update b/libs/sofia-sip/.update
index 52bf634e8e..36fa387d65 100644
--- a/libs/sofia-sip/.update
+++ b/libs/sofia-sip/.update
@@ -1 +1 @@
-Thu Sep 19 19:34:50 EDT 2013
+Tue Oct  8 12:10:32 CDT 2013
diff --git a/libs/sofia-sip/libsofia-sip-ua/sdp/sdp_print.c b/libs/sofia-sip/libsofia-sip-ua/sdp/sdp_print.c
index 537e9fe606..70a5b23b72 100644
--- a/libs/sofia-sip/libsofia-sip-ua/sdp/sdp_print.c
+++ b/libs/sofia-sip/libsofia-sip-ua/sdp/sdp_print.c
@@ -640,14 +640,16 @@ static void print_media(sdp_printer_t *p,
       print_key(p, m->m_key);
 
     for (rm = m->m_rtpmaps; rm; rm = rm->rm_next) {
-      if (!rm->rm_predef || p->pr_all_rtpmaps)
-	sdp_printf(p, "a=rtpmap:%u %s/%lu%s%s" CRLF,
-		   rm->rm_pt, rm->rm_encoding, rm->rm_rate,
-		   rm->rm_params ? "/" : "",
-		   rm->rm_params ? rm->rm_params : "");
-      if (rm->rm_fmtp)
-	sdp_printf(p, "a=fmtp:%u %s" CRLF,
-		   rm->rm_pt, rm->rm_fmtp);
+		if (rm->rm_encoding && *rm->rm_encoding && (!rm->rm_predef || p->pr_all_rtpmaps)) {
+			sdp_printf(p, "a=rtpmap:%u %s/%lu%s%s" CRLF,
+					   rm->rm_pt, rm->rm_encoding, rm->rm_rate,
+					   rm->rm_params ? "/" : "",
+					   rm->rm_params ? rm->rm_params : "");
+		}
+		if (rm->rm_fmtp) {
+			sdp_printf(p, "a=fmtp:%u %s" CRLF,
+					   rm->rm_pt, rm->rm_fmtp);
+		}
     }
 
     if (!p->pr_mode_manual && !m->m_rejected &&