diff --git a/gpu/src/adapter.zig b/gpu/src/adapter.zig
index 3bdae1fb..eaea3694 100644
--- a/gpu/src/adapter.zig
+++ b/gpu/src/adapter.zig
@@ -8,6 +8,34 @@ const RequestDeviceStatus = @import("types.zig").RequestDeviceStatus;
 const Impl = @import("interface.zig").Impl;
 
 pub const Adapter = opaque {
+    pub const Type = enum(u32) {
+        discrete_gpu,
+        integrated_gpu,
+        cpu,
+        unknown,
+
+        pub fn name(t: Type) []const u8 {
+            return switch (t) {
+                .discrete_gpu => "Discrete GPU",
+                .integrated_gpu => "Integrated GPU",
+                .cpu => "CPU",
+                .unknown => "Unknown",
+            };
+        }
+    };
+
+    pub const Properties = extern struct {
+        next_in_chain: ?*ChainedStructOut = null,
+        vendor_id: u32,
+        vendor_name: [*:0]const u8,
+        architecture: [*:0]const u8,
+        device_id: u32,
+        name: [*:0]const u8,
+        driver_description: [*:0]const u8,
+        adapter_type: Type,
+        backend_type: Type,
+    };
+
     pub inline fn createDevice(adapter: *Adapter, descriptor: ?*const DeviceDescriptor) ?Device {
         return Impl.adapterCreateDevice(adapter, descriptor);
     }
@@ -21,7 +49,7 @@ pub const Adapter = opaque {
         return Impl.adapterGetLimits(adapter, limits);
     }
 
-    pub inline fn getProperties(adapter: *Adapter, properties: *AdapterProperties) void {
+    pub inline fn getProperties(adapter: *Adapter, properties: *Adapter.Properties) void {
         Impl.adapterGetProperties(adapter, properties);
     }
 
@@ -49,34 +77,6 @@ pub const RequestDeviceCallback = fn (
     userdata: *anyopaque,
 ) callconv(.C) void;
 
-pub const AdapterType = enum(u32) {
-    discrete_gpu,
-    integrated_gpu,
-    cpu,
-    unknown,
-
-    pub fn name(t: AdapterType) []const u8 {
-        return switch (t) {
-            .discrete_gpu => "Discrete GPU",
-            .integrated_gpu => "Integrated GPU",
-            .cpu => "CPU",
-            .unknown => "Unknown",
-        };
-    }
-};
-
-pub const AdapterProperties = extern struct {
-    next_in_chain: ?*ChainedStructOut = null,
-    vendor_id: u32,
-    vendor_name: [*:0]const u8,
-    architecture: [*:0]const u8,
-    device_id: u32,
-    name: [*:0]const u8,
-    driver_description: [*:0]const u8,
-    adapter_type: AdapterType,
-    backend_type: AdapterType,
-};
-
-test "AdapterType name" {
-    try testing.expectEqualStrings("Discrete GPU", AdapterType.discrete_gpu.name());
+test "Adapter.Type name" {
+    try testing.expectEqualStrings("Discrete GPU", Adapter.Type.discrete_gpu.name());
 }
diff --git a/gpu/src/interface.zig b/gpu/src/interface.zig
index 40b5410c..cbe1aa1a 100644
--- a/gpu/src/interface.zig
+++ b/gpu/src/interface.zig
@@ -22,7 +22,7 @@ pub fn Interface(comptime T: type) type {
     assertDecl(T, "adapterCreateDevice", fn (adapter: *gpu.Adapter, descriptor: ?*const gpu.DeviceDescriptor) callconv(.Inline) ?gpu.Device);
     assertDecl(T, "adapterEnumerateFeatures", fn (adapter: *gpu.Adapter, features: ?[*]gpu.FeatureName) callconv(.Inline) usize);
     assertDecl(T, "adapterGetLimits", fn (adapter: *gpu.Adapter, limits: *gpu.SupportedLimits) callconv(.Inline) bool);
-    assertDecl(T, "adapterGetProperties", fn (adapter: *gpu.Adapter, properties: *gpu.AdapterProperties) callconv(.Inline) void);
+    assertDecl(T, "adapterGetProperties", fn (adapter: *gpu.Adapter, properties: *gpu.Adapter.Properties) callconv(.Inline) void);
     assertDecl(T, "adapterHasFeature", fn (adapter: *gpu.Adapter, feature: gpu.FeatureName) callconv(.Inline) bool);
     assertDecl(T, "adapterRequestDevice", fn (adapter: *gpu.Adapter, descriptor: ?*const gpu.DeviceDescriptor, callback: gpu.RequestDeviceCallback, userdata: *anyopaque) callconv(.Inline) void);
     assertDecl(T, "adapterReference", fn (adapter: *gpu.Adapter) callconv(.Inline) void);
@@ -253,7 +253,7 @@ pub fn Export(comptime T: type) type {
         }
 
         // WGPU_EXPORT void wgpuAdapterGetProperties(WGPUAdapter adapter, WGPUAdapterProperties * properties);
-        export fn wgpuAdapterGetProperties(adapter: *gpu.Adapter, properties: *gpu.AdapterProperties) void {
+        export fn wgpuAdapterGetProperties(adapter: *gpu.Adapter, properties: *gpu.Adapter.Properties) void {
             return T.adapterGetProperties(adapter, properties);
         }
 
@@ -1250,7 +1250,7 @@ pub const StubInterface = Interface(struct {
         unreachable;
     }
 
-    pub inline fn adapterGetProperties(adapter: *gpu.Adapter, properties: *gpu.AdapterProperties) void {
+    pub inline fn adapterGetProperties(adapter: *gpu.Adapter, properties: *gpu.Adapter.Properties) void {
         _ = adapter;
         _ = properties;
         unreachable;