diff --git a/ble_through/ble_proto_utils.c b/ble_through/ble_proto_utils.c
index 234e67d..4ae8e07 100644
--- a/ble_through/ble_proto_utils.c
+++ b/ble_through/ble_proto_utils.c
@@ -16,10 +16,7 @@ bool ble_through_proto_check_packet(zble_proto_packet_t *packet) {
     return false;
   }
 
-  uint8_t checksum = 0;
-  for (int i = 0; i < packet->packetlen - 2; i++) {
-    checksum += pu8[i];
-  }
+  uint8_t checksum = ble_through_proto_sum(packet);
   if (checksum != pu8[packet->packetlen - 2]) {
     return false;
   }