diff --git a/src/mod/endpoints/mod_sofia/sofia_glue.c b/src/mod/endpoints/mod_sofia/sofia_glue.c
index 7921da5819..bcaecf7f7f 100644
--- a/src/mod/endpoints/mod_sofia/sofia_glue.c
+++ b/src/mod/endpoints/mod_sofia/sofia_glue.c
@@ -1654,6 +1654,9 @@ switch_status_t sofia_glue_tech_set_codec(private_object_t *tech_pvt, int force)
 		switch_goto_status(SWITCH_STATUS_FALSE, end);
 	}
 
+	switch_assert(tech_pvt->read_codec.implementation);
+	switch_assert(tech_pvt->write_codec.implementation);
+
 	tech_pvt->read_impl = *tech_pvt->read_codec.implementation;
 	tech_pvt->write_impl = *tech_pvt->write_codec.implementation;