diff --git a/gpu/TODO-webgpu.h b/gpu/TODO-webgpu.h
index 2c8d51d3..1979c70f 100644
--- a/gpu/TODO-webgpu.h
+++ b/gpu/TODO-webgpu.h
@@ -1,8 +1,3 @@
-typedef struct WGPUCommandEncoderDescriptor {
-    next_in_chain: *const ChainedStruct,
-    label: ?[*:0]const u8 = null,
-} WGPUCommandEncoderDescriptor;
-
 typedef struct WGPUCompilationMessage {
     next_in_chain: *const ChainedStruct,
     char const * message; // nullable
diff --git a/gpu/src/command_encoder.zig b/gpu/src/command_encoder.zig
index 06794114..0fe51c85 100644
--- a/gpu/src/command_encoder.zig
+++ b/gpu/src/command_encoder.zig
@@ -1,6 +1,13 @@
+const ChainedStruct = @import("types.zig").ChainedStruct;
+
 pub const CommandEncoder = enum(usize) {
     _,
 
     // TODO: verify there is a use case for nullable value of this type.
     pub const none: CommandEncoder = @intToEnum(CommandEncoder, 0);
+
+    pub const Descriptor = struct {
+        next_in_chain: *const ChainedStruct,
+        label: ?[*:0]const u8 = null,
+    };
 };