diff --git a/gpu/src/instance.zig b/gpu/src/instance.zig
index 5259365f..b0000e76 100644
--- a/gpu/src/instance.zig
+++ b/gpu/src/instance.zig
@@ -7,6 +7,10 @@ const RequestAdapterOptions = @import("main.zig").RequestAdapterOptions;
 const Impl = @import("interface.zig").Impl;
 
 pub const Instance = opaque {
+    pub const Descriptor = extern struct {
+        next_in_chain: ?*const ChainedStruct = null,
+    };
+
     pub inline fn createSurface(instance: *Instance, descriptor: *const SurfaceDescriptor) Surface {
         return Impl.instanceCreateSurface(instance, descriptor);
     }
@@ -30,7 +34,3 @@ pub const RequestAdapterCallback = fn (
     message: ?[*:0]const u8,
     userdata: *anyopaque,
 ) callconv(.C) void;
-
-pub const InstanceDescriptor = extern struct {
-    next_in_chain: ?*const ChainedStruct = null,
-};
diff --git a/gpu/src/interface.zig b/gpu/src/interface.zig
index 60c6211d..d5890fad 100644
--- a/gpu/src/interface.zig
+++ b/gpu/src/interface.zig
@@ -1221,7 +1221,7 @@ pub fn Export(comptime T: type) type {
 
 /// A stub gpu.Interface in which every function is implemented by `unreachable;`
 pub const StubInterface = Interface(struct {
-    pub inline fn createInstance(descriptor: ?*const Instance.Descriptor) ?Instance {
+    pub inline fn createInstance(descriptor: ?*const Instance.Descriptor) ?*Instance {
         _ = descriptor;
         unreachable;
     }
diff --git a/gpu/src/main.zig b/gpu/src/main.zig
index 8e04bb09..2bf4207c 100644
--- a/gpu/src/main.zig
+++ b/gpu/src/main.zig
@@ -122,7 +122,7 @@ pub const RenderPassDescriptor = extern struct {
     timestamp_writes: ?[*]const RenderPassTimestampWrite = null,
 };
 
-pub inline fn createInstance(descriptor: ?*const instance.InstanceDescriptor) ?*instance.Instance {
+pub inline fn createInstance(descriptor: ?*const instance.Instance.Descriptor) ?*instance.Instance {
     return interface.Impl.createInstance(descriptor);
 }