diff --git a/gpu/TODO-webgpu.h b/gpu/TODO-webgpu.h
index a55dba53..62338d6a 100644
--- a/gpu/TODO-webgpu.h
+++ b/gpu/TODO-webgpu.h
@@ -1,4 +1,3 @@
-typedef void (*WGPUDeviceLostCallback)(WGPUDeviceLostReason reason, char const * message, void * userdata);
 typedef void (*WGPUErrorCallback)(WGPUErrorType type, char const * message, void * userdata);
 typedef void (*WGPULoggingCallback)(WGPULoggingType type, char const * message, void * userdata);
 typedef void (*WGPUQueueWorkDoneCallback)(WGPUQueueWorkDoneStatus status, void * userdata);
diff --git a/gpu/src/device.zig b/gpu/src/device.zig
index 73bc114b..1809e685 100644
--- a/gpu/src/device.zig
+++ b/gpu/src/device.zig
@@ -6,6 +6,12 @@ const QueueDescriptor = @import("queue.zig").QueueDescriptor;
 
 pub const Device = *opaque {};
 
+pub const DeviceLostCallback = fn (
+    reason: DeviceLostReason,
+    message: [*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
 pub const DeviceLostReason = enum(u32) {
     undef = 0x00000000,
     destroyed = 0x00000001,