diff --git a/gpu/src/NativeInstance.zig b/gpu/src/NativeInstance.zig
index db40bc6b..e9f39c1d 100644
--- a/gpu/src/NativeInstance.zig
+++ b/gpu/src/NativeInstance.zig
@@ -1204,6 +1204,23 @@ const render_bundle_encoder_vtable = RenderBundleEncoder.VTable{
             );
         }
     }).setBindGroup,
+    .setIndexBuffer = (struct {
+        pub fn setIndexBuffer(
+            ptr: *anyopaque,
+            buffer: Buffer,
+            format: IndexFormat,
+            offset: u64,
+            size: u64,
+        ) void {
+            c.wgpuRenderBundleEncoderSetIndexBuffer(
+                @ptrCast(c.WGPURenderBundleEncoder, ptr),
+                @ptrCast(c.WGPUBuffer, buffer.ptr),
+                @enumToInt(format),
+                offset,
+                size,
+            );
+        }
+    }).setIndexBuffer,
     // .beginOcclusionQuery = (struct {
     //     pub fn beginOcclusionQuery(ptr: *anyopaque, query_index: u32) void {
     //         c.wgpuRenderBundleEncoderBeginOcclusionQuery(@ptrCast(c.WGPURenderBundleEncoder, ptr), query_index);
@@ -1246,23 +1263,6 @@ const render_bundle_encoder_vtable = RenderBundleEncoder.VTable{
     //         );
     //     }
     // }).setBlendConstant,
-    // .setIndexBuffer = (struct {
-    //     pub fn setIndexBuffer(
-    //         ptr: *anyopaque,
-    //         buffer: Buffer,
-    //         format: IndexFormat,
-    //         offset: u64,
-    //         size: u64,
-    //     ) void {
-    //         c.wgpuRenderBundleEncoderSetIndexBuffer(
-    //             @ptrCast(c.WGPURenderBundleEncoder, ptr),
-    //             @ptrCast(c.WGPUBuffer, buffer.ptr),
-    //             @enumToInt(format),
-    //             offset,
-    //             size,
-    //         );
-    //     }
-    // }).setIndexBuffer,
     // .setScissorRect = (struct {
     //     pub fn setScissorRect(ptr: *anyopaque, x: u32, y: u32, width: u32, height: u32) void {
     //         c.wgpuRenderBundleEncoderSetScissorRect(
diff --git a/gpu/src/RenderBundleEncoder.zig b/gpu/src/RenderBundleEncoder.zig
index 4cc955db..d633933d 100644
--- a/gpu/src/RenderBundleEncoder.zig
+++ b/gpu/src/RenderBundleEncoder.zig
@@ -2,6 +2,7 @@ const Texture = @import("Texture.zig");
 const Buffer = @import("Buffer.zig");
 const RenderBundle = @import("RenderBundle.zig");
 const BindGroup = @import("BindGroup.zig");
+const IndexFormat = @import("enums.zig").IndexFormat;
 
 const RenderBundleEncoder = @This();
 
@@ -35,8 +36,7 @@ pub const VTable = struct {
     popDebugGroup: fn (ptr: *anyopaque) void,
     pushDebugGroup: fn (ptr: *anyopaque, group_label: [*:0]const u8) void,
     setBindGroup: fn (ptr: *anyopaque, group_index: u32, group: BindGroup, dynamic_offsets: []u32) void,
-    // setIndexBuffer: fn (ptr: *anyopaque, buffer: Buffer, format: IndexFormat, offset: u64, size: u64) void,
-    // WGPU_EXPORT void wgpuRenderBundleEncoderSetIndexBuffer(WGPURenderBundleEncoder renderBundleEncoder, WGPUBuffer buffer, WGPUIndexFormat format, uint64_t offset, uint64_t size);
+    setIndexBuffer: fn (ptr: *anyopaque, buffer: Buffer, format: IndexFormat, offset: u64, size: u64) void,
     setLabel: fn (ptr: *anyopaque, label: [:0]const u8) void,
     // setPipeline: fn (ptr: *anyopaque, pipeline: RenderPipeline) void,
     // WGPU_EXPORT void wgpuRenderBundleEncoderSetPipeline(WGPURenderBundleEncoder renderBundleEncoder, WGPURenderPipeline pipeline);
@@ -106,6 +106,16 @@ pub inline fn setBindGroup(
     enc.vtable.setBindGroup(enc.ptr, group_index, group, dynamic_offsets);
 }
 
+pub inline fn setIndexBuffer(
+    enc: RenderBundleEncoder,
+    buffer: Buffer,
+    format: IndexFormat,
+    offset: u64,
+    size: u64,
+) void {
+    enc.vtable.setIndexBuffer(enc.ptr, buffer, format, offset, size);
+}
+
 // pub inline fn beginOcclusionQuery(enc: RenderBundleEncoder, query_index: u32) void {
 //     enc.vtable.beginOcclusionQuery(enc.ptr, query_index);
 // }
@@ -122,16 +132,6 @@ pub inline fn setBindGroup(
 //     enc.vtable.setBlendConstant(enc.ptr, color);
 // }
 
-// pub inline fn setIndexBuffer(
-//     enc: RenderBundleEncoder,
-//     buffer: Buffer,
-//     format: IndexFormat,
-//     offset: u64,
-//     size: u64,
-// ) void {
-//     enc.vtable.setIndexBuffer(enc.ptr, buffer, format, offset, size);
-// }
-
 pub inline fn setLabel(enc: RenderBundleEncoder, label: [:0]const u8) void {
     enc.vtable.setLabel(enc.ptr, label);
 }
@@ -196,5 +196,6 @@ test {
     _ = popDebugGroup;
     _ = pushDebugGroup;
     _ = setBindGroup;
+    _ = setIndexBuffer;
     _ = Descriptor;
 }