diff --git a/core/net/mac/tsch/tsch.c b/core/net/mac/tsch/tsch.c
index 1d9701e42..4e24ea8da 100644
--- a/core/net/mac/tsch/tsch.c
+++ b/core/net/mac/tsch/tsch.c
@@ -936,6 +936,7 @@ send_packet(mac_callback_t sent, void *ptr)
              tsch_queue_packet_count(addr),
              p->header_len,
              queuebuf_datalen(p->qb));
+      (void)packet_count_before; /* Discard "variable set but unused" warning in case of TSCH_LOG_LEVEL of 0 */
     }
   }
   if(ret != MAC_TX_DEFERRED) {