diff --git a/gpu/src/render_bundle_encoder.zig b/gpu/src/render_bundle_encoder.zig
index aa8ed765..cc7f1473 100644
--- a/gpu/src/render_bundle_encoder.zig
+++ b/gpu/src/render_bundle_encoder.zig
@@ -88,8 +88,8 @@ pub const RenderBundleEncoderDescriptor = extern struct {
     label: ?[*:0]const u8 = null,
     color_formats_count: u32,
     color_formats: [*]const TextureFormat,
-    depth_stencil_format: TextureFormat,
-    sample_count: u32,
-    depth_read_only: bool,
-    stencil_read_only: bool,
+    depth_stencil_format: TextureFormat = .undef,
+    sample_count: u32 = 1,
+    depth_read_only: bool = false,
+    stencil_read_only: bool = false,
 };