diff --git a/include/Huawei_can.h b/include/Huawei_can.h
index 296bc4884..5867998d0 100644
--- a/include/Huawei_can.h
+++ b/include/Huawei_can.h
@@ -75,14 +75,14 @@ class HuaweiCanClass {
     void setPower(bool power);
 
     RectifierParameters_t * get();
-    unsigned long getLastUpdate();
+    uint32_t getLastUpdate();
 
 private:
     void sendRequest();
     void onReceive(uint8_t* frame, uint8_t len);
 
-    unsigned long previousMillis;
-    unsigned long lastUpdate;
+    uint32_t previousMillis;
+    uint32_t lastUpdate;
     RectifierParameters_t _rp;
 
     SPIClass *spi;
diff --git a/src/Huawei_can.cpp b/src/Huawei_can.cpp
index 9d6fce3ae..1f4c495fb 100644
--- a/src/Huawei_can.cpp
+++ b/src/Huawei_can.cpp
@@ -43,7 +43,7 @@ RectifierParameters_t * HuaweiCanClass::get()
     return &_rp;
 }
 
-unsigned long HuaweiCanClass::getLastUpdate()
+uint32_t HuaweiCanClass::getLastUpdate()
 {
     return lastUpdate;
 }
@@ -142,7 +142,7 @@ void HuaweiCanClass::onReceive(uint8_t* frame, uint8_t len)
 void HuaweiCanClass::loop()
 {
 
-  long unsigned int rxId;
+  INT32U rxId;
   unsigned char len = 0;
   unsigned char rxBuf[8];