diff --git a/User/bsp/fdcan.h b/User/bsp/fdcan.h
index 99ecd80..0b49d6f 100644
--- a/User/bsp/fdcan.h
+++ b/User/bsp/fdcan.h
@@ -16,7 +16,7 @@ extern "C" {
 /* USER INCLUDE END */
 
 /* Exported constants ------------------------------------------------------- */
-#define BSP_FDCAN_MAX_DLC                 64
+#define BSP_FDCAN_MAX_DLC                 8
 #define BSP_FDCAN_DEFAULT_QUEUE_SIZE      10
 #define BSP_FDCAN_TIMEOUT_IMMEDIATE       0
 #define BSP_FDCAN_TIMEOUT_FOREVER         osWaitForever