diff --git a/deno_webgpu/src/02_idl_types.js b/deno_webgpu/src/02_idl_types.js
index 3cc018e02e..c1532c7ec9 100644
--- a/deno_webgpu/src/02_idl_types.js
+++ b/deno_webgpu/src/02_idl_types.js
@@ -41,7 +41,7 @@
   } = window.__bootstrap.webgpu;
   const { SymbolIterator, TypeError } = window.__bootstrap.primordials;
 
-  // This needs to be initalized after all of the base classes are implmented,
+  // This needs to be initialized after all of the base classes are implemented,
   // otherwise their converters might not be available yet.
   // DICTIONARY: GPUObjectDescriptorBase
   const dictMembersGPUObjectDescriptorBase = [
@@ -1454,7 +1454,9 @@
     {
       key: "targets",
       converter: webidl.createSequenceConverter(
-        webidl.converters["GPUColorTargetState"],
+        webidl.createNullableConverter(
+          webidl.converters["GPUColorTargetState"],
+        ),
       ),
       required: true,
     },
@@ -1833,7 +1835,9 @@
     {
       key: "colorAttachments",
       converter: webidl.createSequenceConverter(
-        webidl.converters["GPURenderPassColorAttachment"],
+        webidl.createNullableConverter(
+          webidl.converters["GPURenderPassColorAttachment"],
+        ),
       ),
       required: true,
     },
@@ -1878,7 +1882,7 @@
     {
       key: "colorFormats",
       converter: webidl.createSequenceConverter(
-        webidl.converters["GPUTextureFormat"],
+        webidl.createNullableConverter(webidl.converters["GPUTextureFormat"]),
       ),
       required: true,
     },