diff --git a/Inc/fc7xxx_driver_flexcan.h b/Inc/fc7xxx_driver_flexcan.h
index 48c746a..86403a8 100644
--- a/Inc/fc7xxx_driver_flexcan.h
+++ b/Inc/fc7xxx_driver_flexcan.h
@@ -173,7 +173,7 @@ typedef struct
 {
     uint8_t                 u8TxHandler;     /**< one message buffer used one handler, range 0 ~ txMbCnt-1     */
     uint8_t                 bWaitTxCompleted;/**< wait transmit complete and clear iflag                       */
-    uint16_t                u16WaitTxTimeout;  /**< wait transmit complete timeout                               */
+    uint32_t                u16WaitTxTimeout;  /**< wait transmit complete timeout                               */
     uint8_t                 bEnFd;           /**< enable FLEXCAN fd                                            */
     uint8_t                 bEnBrs;          /**< enable canfd data bit switch                                 */
     uint32_t                u32CanId;        /**< FLEXCAN id                                                   */