diff --git a/src/mod/endpoints/mod_sofia/mod_sofia.c b/src/mod/endpoints/mod_sofia/mod_sofia.c
index 6dc6e90f55..11db95e45d 100644
--- a/src/mod/endpoints/mod_sofia/mod_sofia.c
+++ b/src/mod/endpoints/mod_sofia/mod_sofia.c
@@ -626,8 +626,12 @@ static switch_status_t sofia_read_frame(switch_core_session_t *session, switch_f
 			if (tech_pvt->read_frame.datalen > 0) {
 				size_t bytes = 0;
 				int frames = 1;
-
+				
 				if (!switch_test_flag((&tech_pvt->read_frame), SFF_CNG)) {
+					if (!tech_pvt->read_codec.implementation) {
+						*frame = NULL;
+						return SWITCH_STATUS_GENERR;
+					}
 					if ((bytes = tech_pvt->read_codec.implementation->encoded_bytes_per_frame)) {
 						frames = (tech_pvt->read_frame.datalen / bytes);
 					}