diff --git a/gpu/src/dawn.zig b/gpu/src/dawn.zig
index e858e201..33438109 100644
--- a/gpu/src/dawn.zig
+++ b/gpu/src/dawn.zig
@@ -13,7 +13,6 @@ pub const EncoderInternalUsageDescriptor = extern struct {
     use_internal_usages: bool = false,
 };
 
-/// TODO: Can be chained in gpu.Instance.Descriptor
 pub const InstanceDescriptor = extern struct {
     chain: ChainedStruct = .{ .next = null, .s_type = .dawn_instance_descriptor },
     additional_runtime_search_paths_count: u32 = 0,
diff --git a/gpu/src/instance.zig b/gpu/src/instance.zig
index f45d4b9b..c0d9dcd8 100644
--- a/gpu/src/instance.zig
+++ b/gpu/src/instance.zig
@@ -5,10 +5,16 @@ const Adapter = @import("adapter.zig").Adapter;
 const RequestAdapterOptions = @import("types.zig").RequestAdapterOptions;
 const RequestAdapterCallback = @import("callbacks.zig").RequestAdapterCallback;
 const Impl = @import("interface.zig").Impl;
+const dawn = @import("dawn.zig");
 
 pub const Instance = opaque {
     pub const Descriptor = extern struct {
-        next_in_chain: ?*const ChainedStruct = null,
+        pub const NextInChain = extern union {
+            generic: ?*const ChainedStruct,
+            dawn_instance_descriptor: *const dawn.InstanceDescriptor,
+        };
+
+        next_in_chain: NextInChain = .{ .generic = null },
     };
 
     pub inline fn createSurface(instance: *Instance, descriptor: *const Surface.Descriptor) *Surface {