diff --git a/gpu/TODO-webgpu.h b/gpu/TODO-webgpu.h
index e8a699e0..0bbd4fec 100644
--- a/gpu/TODO-webgpu.h
+++ b/gpu/TODO-webgpu.h
@@ -1,14 +1,3 @@
-typedef struct WGPUCopyTextureForBrowserOptions {
-    next_in_chain: *const ChainedStruct,
-    flip_y: bool,
-    needs_color_space_conversion: bool,
-    WGPUAlphaMode srcAlphaMode;
-    float const * srcTransferFunctionParameters; // nullable
-    float const * conversionMatrix; // nullable
-    float const * dstTransferFunctionParameters; // nullable
-    WGPUAlphaMode dstAlphaMode;
-} WGPUCopyTextureForBrowserOptions;
-
 typedef struct WGPUDawnCacheDeviceDescriptor {
     WGPUChainedStruct chain;
     char const * isolationKey;
diff --git a/gpu/src/main.zig b/gpu/src/main.zig
index 8df8ee01..a33e6f79 100644
--- a/gpu/src/main.zig
+++ b/gpu/src/main.zig
@@ -44,6 +44,17 @@ pub const ComputePassTimestampWrite = struct {
     location: ComputePassTimestampLocation,
 };
 
+pub const CopyTextureForBrowserOptions = extern struct {
+    next_in_chain: *const ChainedStruct,
+    flip_y: bool,
+    needs_color_space_conversion: bool,
+    src_alpha_mode: AlphaMode,
+    src_transfer_function_parameters: ?*const f32 = null,
+    conversion_matrix: ?*const f32 = null,
+    dst_transfer_function_parameters: ?*const f32 = null,
+    dst_alpha_mode: AlphaMode,
+};
+
 test {
     refAllDecls(@import("adapter.zig"));
     refAllDecls(@import("bind_group.zig"));