diff --git a/gpu/src/render_pipeline.zig b/gpu/src/render_pipeline.zig
index 90c28142..186d5c7a 100644
--- a/gpu/src/render_pipeline.zig
+++ b/gpu/src/render_pipeline.zig
@@ -6,20 +6,15 @@ const PrimitiveState = @import("types.zig").PrimitiveState;
 const FragmentState = @import("types.zig").FragmentState;
 const PipelineLayout = @import("pipeline_layout.zig").PipelineLayout;
 
-pub const RenderPipeline = enum(usize) {
-    _,
+pub const RenderPipeline = *opaque {};
 
-    // TODO: verify there is a use case for nullable value of this type.
-    pub const none: RenderPipeline = @intToEnum(RenderPipeline, 0);
-
-    pub const Descriptor = extern struct {
-        next_in_chain: *const ChainedStruct,
-        label: ?[*:0]const u8 = null,
-        layout: ?PipelineLayout,
-        vertex: VertexState,
-        primitive: PrimitiveState,
-        depth_stencil: ?*const DepthStencilState = null, // nullable
-        multisample: MultisampleState,
-        fragment: ?*const FragmentState = null, // nullable
-    };
+pub const RenderPipelineDescriptor = extern struct {
+    next_in_chain: *const ChainedStruct,
+    label: ?[*:0]const u8 = null,
+    layout: ?PipelineLayout,
+    vertex: VertexState,
+    primitive: PrimitiveState,
+    depth_stencil: ?*const DepthStencilState = null, // nullable
+    multisample: MultisampleState,
+    fragment: ?*const FragmentState = null, // nullable
 };