diff --git a/library.json b/library.json
index 1f926c2..0ad8659 100644
--- a/library.json
+++ b/library.json
@@ -13,7 +13,7 @@
       "maintainer": true
     }
   ],
-  "version": "6.4.2",
+  "version": "6.4.3",
   "frameworks": "*",
   "platforms": "*",
   "export": {
diff --git a/src/tiny_comm.c b/src/tiny_comm.c
index 2807972..49c94bf 100644
--- a/src/tiny_comm.c
+++ b/src/tiny_comm.c
@@ -132,7 +132,7 @@ static void byte_received(void* context, const void* _args)
 
     switch(self->receive_state) {
       case receive_state_receive_crc_msb:
-        self->receive_crc = args->byte << 8;
+        self->receive_crc = (uint16_t)(args->byte << 8);
         self->receive_state = receive_state_receive_crc_lsb;
         break;