diff --git a/chipset/sx128x/ll_sx1280.c b/chipset/sx128x/ll_sx1280.c
index 2bc1d520b..ab5f03d5b 100644
--- a/chipset/sx128x/ll_sx1280.c
+++ b/chipset/sx128x/ll_sx1280.c
@@ -1136,6 +1136,8 @@ static void ll_handle_control(ll_pdu_t * rx_packet){
             ll_terminate();
             break;
         default:
+            btstack_assert(false);
+            printf("Unhandled LL Control PDU 0x%02x\n", opcode);
             break;
     }
 }