--- chan_sip.c-orig	2013-11-28 14:33:46.383720188 +0100
+++ chan_sip.c	2013-12-02 16:06:23.415561117 +0100
@@ -10341,6 +10341,12 @@
 					 * respond with the EC they want to use */
 					ast_udptl_set_error_correction_scheme(p->udptl, UDPTL_ERROR_CORRECTION_NONE);
 				}
+			} else if ((sscanf(m, "image %30u RTP/AVP t38%n", &x, &len) == 1 && len > 0) ||
+					(sscanf(m, "image %30u rtp/avp t38%n", &x, &len) == 1 && len > 0) ||
+					(sscanf(m, "image %30u RTP/SAVP t38%n", &x, &len) == 1 && len > 0) ||
+					(sscanf(m, "image %30u rtp/savp t38%n", &x, &len) == 1 && len > 0)) {
+					ast_log(LOG_WARNING, "Declining unsupported image stream: %s\n", m);
+					continue;
 			} else {
 				ast_log(LOG_WARNING, "Rejecting image media offer due to invalid or unsupported syntax: %s\n", m);
 				res = -1;