diff --git a/ext/node/polyfill.rs b/ext/node/polyfill.rs
index ff4b0f43ca..3d4a1a9fc7 100644
--- a/ext/node/polyfill.rs
+++ b/ext/node/polyfill.rs
@@ -32,6 +32,7 @@ pub struct NodeModulePolyfill {
   pub specifier: &'static str,
 }
 
+// NOTE(bartlomieju): keep this list in sync with `ext/node/polyfills/01_require.js`
 pub static SUPPORTED_BUILTIN_NODE_MODULES: &[NodeModulePolyfill] = &[
   NodeModulePolyfill {
     name: "assert",
@@ -73,6 +74,10 @@ pub static SUPPORTED_BUILTIN_NODE_MODULES: &[NodeModulePolyfill] = &[
     name: "dgram",
     specifier: "ext:deno_node/dgram.ts",
   },
+  NodeModulePolyfill {
+    name: "diagnostics_channel",
+    specifier: "ext:deno_node/diagnostics_channel.ts",
+  },
   NodeModulePolyfill {
     name: "dns",
     specifier: "ext:deno_node/dns.ts",
diff --git a/ext/node/polyfills/01_require.js b/ext/node/polyfills/01_require.js
index 7b91d12aa0..394015e31c 100644
--- a/ext/node/polyfills/01_require.js
+++ b/ext/node/polyfills/01_require.js
@@ -132,6 +132,7 @@ import zlib from "ext:deno_node/zlib.ts";
 const nativeModuleExports = ObjectCreate(null);
 const builtinModules = [];
 
+// NOTE(bartlomieju): keep this list in sync with `ext/node/polyfill.rs`
 function setupBuiltinModules() {
   const nodeModules = {
     "_http_agent": _httpAgent,