diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index 87b34dfd31..2b7aa28bbb 100644
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -8276,7 +8276,16 @@ void sofia_handle_sip_i_invite(switch_core_session_t *session, nua_t *nua, sofia
 		
 		for (mp = sip->sip_multipart; mp; mp = mp->mp_next) {
 			if (mp->mp_payload && mp->mp_payload->pl_data && mp->mp_content_type && mp->mp_content_type->c_type) {
-				switch_channel_set_variable_name_printf(channel, mp->mp_payload->pl_data, SOFIA_MULTIPART_PREFIX "%s", mp->mp_content_type->c_type);
+				char *name = switch_core_session_strdup(session, mp->mp_content_type->c_type);
+				char *p;
+
+				for (p = name; p && *p; p++) {
+					if (*p == '/') {
+						*p = '_';
+					}
+				}
+				
+				switch_channel_set_variable_name_printf(channel, mp->mp_payload->pl_data, SOFIA_MULTIPART_PREFIX "%s", name);
 			}
 		}
 	}