diff --git a/contrib/vhost-user-scsi/vhost-user-scsi.c b/contrib/vhost-user-scsi/vhost-user-scsi.c
index 0fc14d7899..7a1db164c8 100644
--- a/contrib/vhost-user-scsi/vhost-user-scsi.c
+++ b/contrib/vhost-user-scsi/vhost-user-scsi.c
@@ -115,7 +115,7 @@ static int get_cdb_len(uint8_t *cdb)
     case 4: return 16;
     case 5: return 12;
     }
-    g_warning("Unable to determine cdb len (0x%02hhX)", cdb[0] >> 5);
+    g_warning("Unable to determine cdb len (0x%02hhX)", (uint8_t)(cdb[0] >> 5));
     return -1;
 }