diff --git a/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.h b/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.h
index a1df84d44..d44ccf4ee 100644
--- a/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.h
+++ b/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.h
@@ -176,6 +176,7 @@ typedef struct {
     uint8_t                 data8[8];       /**< @brief Frame data.         */
     uint16_t                data16[4];      /**< @brief Frame data.         */
     uint32_t                data32[2];      /**< @brief Frame data.         */
+    uint64_t                data64[1];      /**< @brief Frame data.         */
   };
 } CANTxFrame;
 
@@ -206,6 +207,7 @@ typedef struct {
     uint8_t                 data8[8];       /**< @brief Frame data.         */
     uint16_t                data16[4];      /**< @brief Frame data.         */
     uint32_t                data32[2];      /**< @brief Frame data.         */
+    uint64_t                data64[1];      /**< @brief Frame data.         */
   };
 } CANRxFrame;