diff --git a/quantum/vial.h b/quantum/vial.h
index c1ff05d39a..b3df6fdbe2 100644
--- a/quantum/vial.h
+++ b/quantum/vial.h
@@ -18,6 +18,6 @@
 
 #include <inttypes.h>
 
-#define VIAL_PROTOCOL_VERSION 0x00000000
+#define VIAL_PROTOCOL_VERSION ((uint32_t)0x00000000)
 
 void vial_handle_cmd(uint8_t *data, uint8_t length);