diff --git a/gpu/src/bind_group.zig b/gpu/src/bind_group.zig
index 8d354ec7..97b0e0d5 100644
--- a/gpu/src/bind_group.zig
+++ b/gpu/src/bind_group.zig
@@ -3,11 +3,17 @@ const Sampler = @import("sampler.zig").Sampler;
 const TextureView = @import("texture_view.zig").TextureView;
 const ChainedStruct = @import("types.zig").ChainedStruct;
 const BindGroupLayout = @import("bind_group_layout.zig").BindGroupLayout;
+const ExternalTexture = @import("external_texture.zig").ExternalTexture;
 const Impl = @import("interface.zig").Impl;
 
 pub const BindGroup = opaque {
     pub const Entry = extern struct {
-        next_in_chain: ?*const ChainedStruct = null,
+        pub const NextInChain = extern union {
+            generic: ?*const ChainedStruct,
+            external_texture_binding_entry: *const ExternalTexture.BindingEntry,
+        };
+
+        next_in_chain: NextInChain = .{ .generic = null },
         binding: u32,
         buffer: ?*Buffer = null,
         offset: u64 = 0,
diff --git a/gpu/src/external_texture.zig b/gpu/src/external_texture.zig
index 21916185..fddb5d17 100644
--- a/gpu/src/external_texture.zig
+++ b/gpu/src/external_texture.zig
@@ -3,7 +3,6 @@ const TextureView = @import("texture_view.zig").TextureView;
 const Impl = @import("interface.zig").Impl;
 
 pub const ExternalTexture = opaque {
-    /// TODO: Can be chained in gpu.BindGroup.Entry
     pub const BindingEntry = extern struct {
         chain: ChainedStruct = .{ .next = null, .s_type = .external_texture_binding_entry },
         external_texture: *ExternalTexture,
diff --git a/gpu/src/types.zig b/gpu/src/types.zig
index c465dd1e..d27bd0d1 100644
--- a/gpu/src/types.zig
+++ b/gpu/src/types.zig
@@ -92,7 +92,7 @@ pub const RenderPassDescriptor = extern struct {
 
     /// Provides a slightly friendlier Zig API to initialize this structure.
     pub inline fn init(v: struct {
-        next_in_chain: ?*const ChainedStruct = null,
+        next_in_chain: NextInChain = .{ .generic = null },
         label: ?[*:0]const u8 = null,
         color_attachments: ?[]const RenderPassColorAttachment = null,
         depth_stencil_attachment: ?*const RenderPassDepthStencilAttachment = null,