diff --git a/src/dawn_native/Buffer.cpp b/src/dawn_native/Buffer.cpp
index 74d74eb..4f89724 100644
--- a/src/dawn_native/Buffer.cpp
+++ b/src/dawn_native/Buffer.cpp
@@ -35,7 +35,10 @@
                 : buffer(std::move(buffer)), id(id) {
             }
             void Finish() override {
-                buffer->OnMapRequestCompleted(id);
+                buffer->OnMapRequestCompleted(id, WGPUBufferMapAsyncStatus_Success);
+            }
+            void HandleDeviceLoss() override {
+                buffer->OnMapRequestCompleted(id, WGPUBufferMapAsyncStatus_DeviceLost);
             }
             ~MapRequestTask() override = default;
 
@@ -537,8 +540,8 @@
         mState = BufferState::Destroyed;
     }
 
-    void BufferBase::OnMapRequestCompleted(MapRequestID mapID) {
-        CallMapCallback(mapID, WGPUBufferMapAsyncStatus_Success);
+    void BufferBase::OnMapRequestCompleted(MapRequestID mapID, WGPUBufferMapAsyncStatus status) {
+        CallMapCallback(mapID, status);
     }
 
     bool BufferBase::IsDataInitialized() const {