diff --git a/gpu/TODO-webgpu.h b/gpu/TODO-webgpu.h
index cb0478eb..ecea952a 100644
--- a/gpu/TODO-webgpu.h
+++ b/gpu/TODO-webgpu.h
@@ -1,13 +1,3 @@
-typedef struct WGPUChainedStruct {
-    struct WGPUChainedStruct const * next;
-    WGPUSType sType;
-} WGPUChainedStruct;
-
-typedef struct WGPUChainedStructOut {
-    struct WGPUChainedStructOut * next;
-    WGPUSType sType;
-} WGPUChainedStructOut;
-
 typedef struct WGPUAdapterProperties {
     WGPUChainedStructOut * nextInChain;
     uint32_t vendorID;
diff --git a/gpu/src/types.zig b/gpu/src/types.zig
index eb54119e..90b35c01 100644
--- a/gpu/src/types.zig
+++ b/gpu/src/types.zig
@@ -364,6 +364,16 @@ pub const ShaderStage = packed struct {
     }
 };
 
+pub const ChainedStruct = extern struct {
+    next: *const ChainedStruct,
+    s_type: SType,
+};
+
+pub const ChainedStructOut = extern struct {
+    next: *ChainedStructOut,
+    s_type: SType,
+};
+
 test "BackendType name" {
     try testing.expectEqualStrings("Vulkan", BackendType.vulkan.name());
 }