diff --git a/libraries/AP_HAL_SITL/CANSocketIface.cpp b/libraries/AP_HAL_SITL/CANSocketIface.cpp
index b4e9735a48..cf4b9a0286 100644
--- a/libraries/AP_HAL_SITL/CANSocketIface.cpp
+++ b/libraries/AP_HAL_SITL/CANSocketIface.cpp
@@ -310,7 +310,7 @@ void CANIface::_pollWrite()
     while (_hasReadyTx()) {
         WITH_SEMAPHORE(sem);
         const CanTxItem tx = _tx_queue.top();
-        uint64_t curr_time = AP_HAL::native_micros64();
+        uint64_t curr_time = AP_HAL::micros64();
         if (tx.deadline >= curr_time) {
             // hal.console->printf("%x TDEAD: %lu CURRT: %lu DEL: %lu\n",tx.frame.id,  tx.deadline, curr_time, tx.deadline-curr_time);
             const int res = _write(tx.frame);
@@ -342,7 +342,7 @@ bool CANIface::_pollRead()
     while (iterations_count < CAN_MAX_POLL_ITERATIONS_COUNT)
     {
         CanRxItem rx;
-        rx.timestamp_us = AP_HAL::native_micros64();  // Monotonic timestamp is not required to be precise (unlike UTC)
+        rx.timestamp_us = AP_HAL::micros64();  // Monotonic timestamp is not required to be precise (unlike UTC)
         bool loopback = false;
         int res;
         res = _read(rx.frame, rx.timestamp_us, loopback);
@@ -423,7 +423,7 @@ int CANIface::_read(AP_HAL::CANFrame& frame, uint64_t& timestamp_us, bool& loopb
     /*
      * Timestamp
      */
-    timestamp_us = AP_HAL::native_micros64();
+    timestamp_us = AP_HAL::micros64();
     return 1;
 }
 
@@ -558,8 +558,8 @@ bool CANIface::select(bool &read_select, bool &write_select,
                 stats.num_tx_poll_req++;
             }
         }
-        if (_evt_handle != nullptr && blocking_deadline > AP_HAL::native_micros64()) {
-            _evt_handle->wait(blocking_deadline - AP_HAL::native_micros64());
+        if (_evt_handle != nullptr && blocking_deadline > AP_HAL::micros64()) {
+            _evt_handle->wait(blocking_deadline - AP_HAL::micros64());
         }
     }
 
diff --git a/libraries/AP_HAL_SITL/SITL_Periph_State.cpp b/libraries/AP_HAL_SITL/SITL_Periph_State.cpp
index 3291a3fc30..a2adaacf7e 100644
--- a/libraries/AP_HAL_SITL/SITL_Periph_State.cpp
+++ b/libraries/AP_HAL_SITL/SITL_Periph_State.cpp
@@ -109,7 +109,7 @@ void SITL_State::init(int argc, char * const argv[]) {
 }
 
 void SITL_State::wait_clock(uint64_t wait_time_usec) {
-    while (AP_HAL::native_micros64() < wait_time_usec) {
+    while (AP_HAL::micros64() < wait_time_usec) {
         usleep(1000);
     }
 }
diff --git a/libraries/AP_HAL_SITL/system.cpp b/libraries/AP_HAL_SITL/system.cpp
index 518a2f3e16..138ee2a7c2 100644
--- a/libraries/AP_HAL_SITL/system.cpp
+++ b/libraries/AP_HAL_SITL/system.cpp
@@ -193,65 +193,4 @@ uint64_t millis64()
     return ret;
 }
 
-
-uint32_t native_micros()
-{
-#if AP_TEST_DRONECAN_DRIVERS
-    return micros();
-#else
-    return native_micros64() & 0xFFFFFFFF;
-#endif
-}
-
-uint32_t native_millis()
-{
-#if AP_TEST_DRONECAN_DRIVERS
-    return millis();
-#else
-    return native_millis64() & 0xFFFFFFFF;
-#endif
-}
-
-/*
-  we define a millis16() here to avoid an issue with sitl builds in cygwin
- */
-uint16_t native_millis16()
-{
-#if AP_TEST_DRONECAN_DRIVERS
-    return millis16();
-#else
-    return native_millis64() & 0xFFFF;
-#endif
-}
-    
-
-uint64_t native_micros64()
-{
-#if AP_TEST_DRONECAN_DRIVERS
-    return micros64();
-#else
-    struct timeval tp;
-    gettimeofday(&tp, nullptr);
-    uint64_t ret = 1.0e6 * ((tp.tv_sec + (tp.tv_usec * 1.0e-6)) -
-                            (state.start_time.tv_sec +
-                             (state.start_time.tv_usec * 1.0e-6)));
-    return ret;
-#endif
-}
-
-uint64_t native_millis64()
-{
-#if AP_TEST_DRONECAN_DRIVERS
-    return millis64();
-#else
-    struct timeval tp;
-    gettimeofday(&tp, nullptr);
-    uint64_t ret = 1.0e3*((tp.tv_sec + (tp.tv_usec*1.0e-6)) -
-                          (state.start_time.tv_sec +
-                           (state.start_time.tv_usec*1.0e-6)));
-    return ret;
-#endif
-}
-
-
 } // namespace AP_HAL