diff --git a/tsconfig.json b/tsconfig.json
index d1d6469f494f97..048ecd6f48e3ee 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,7 +6,9 @@
     "./typings/internalBinding/http_parser.d.ts",
     "./typings/internalBinding/messaging.d.ts",
     "./typings/internalBinding/options.d.ts",
+    "./typings/internalBinding/os.d.ts",
     "./typings/internalBinding/serdes.d.ts",
+    "./typings/internalBinding/timers.d.ts",
     "./typings/internalBinding/util.d.ts",
     "./typings/internalBinding/worker.d.ts",
     "./typings/internalBinding.d.ts",
diff --git a/typings/internalBinding/options.d.ts b/typings/internalBinding/options.d.ts
index 2257463174d101..ded726f9d71127 100644
--- a/typings/internalBinding/options.d.ts
+++ b/typings/internalBinding/options.d.ts
@@ -20,6 +20,7 @@ declare function InternalBinding(binding: 'options'): {
     kAllowedInEnvironment: 0;
     kDisallowedInEnvironment: 1;
   };
+  noGlobalSearchPaths: boolean;
   shouldNotRegisterESMLoader: boolean;
   types: {
     kNoOp: 0;
diff --git a/typings/internalBinding/os.d.ts b/typings/internalBinding/os.d.ts
new file mode 100644
index 00000000000000..cdddc330151a3e
--- /dev/null
+++ b/typings/internalBinding/os.d.ts
@@ -0,0 +1,21 @@
+declare function InternalBinding(binding: 'os'): {
+  getHostname(ctx: {}): string | undefined;
+  getLoadAvg(array: Float64Array): void;
+  getUptime(): number;
+  getTotalMem(): number;
+  getFreeMem(): number;
+  getCPUs(): Array<string | number>;
+  getInterfaceAddresses(ctx: {}): Array<string | number | boolean> | undefined;
+  getHomeDirectory(ctx: {}): string | undefined;
+  getUserInfo(options: { encoding?: string } | undefined, ctx: {}): {
+    uid: number;
+    gid: number;
+    username: string;
+    homedir: string;
+    shell: string | null;
+  } | undefined;
+  setPriority(pid: number, priority: number, ctx: {}): number;
+  getPriority(pid: number, ctx: {}): number | undefined;
+  getOSInformation(ctx: {}): [sysname: string, version: string, release: string];
+  isBigEndian: boolean;
+};
diff --git a/typings/internalBinding/timers.d.ts b/typings/internalBinding/timers.d.ts
new file mode 100644
index 00000000000000..fd6d40ecfee5cc
--- /dev/null
+++ b/typings/internalBinding/timers.d.ts
@@ -0,0 +1,8 @@
+declare function InternalBinding(binding: 'timers'): {
+  getLibuvNow(): number;
+  setupTimers(immediateCallback: () => void, timersCallback: (now: number) => void): void;
+  scheduleTimer(msecs: number): void;
+  toggleTimerRef(value: boolean): void;
+  toggleImmediateRef(value: boolean): void;
+  immediateInfo: Uint32Array;
+};
diff --git a/typings/internalBinding/util.d.ts b/typings/internalBinding/util.d.ts
index 2158c7ed688bcd..3d89796662f74a 100644
--- a/typings/internalBinding/util.d.ts
+++ b/typings/internalBinding/util.d.ts
@@ -44,4 +44,5 @@ declare function InternalBinding(binding: 'util'): {
   shouldAbortOnUncaughtToggle: [shouldAbort: 0 | 1];
   WeakReference: typeof InternalUtilBinding.WeakReference;
   guessHandleType(fd: number): 'TCP' | 'TTY' | 'UDP' | 'FILE' | 'PIPE' | 'UNKNOWN';
+  toUSVString(str: string, start: number): string;
 };
diff --git a/typings/primordials.d.ts b/typings/primordials.d.ts
index beed1d7b83c4c9..5c291769de66b1 100644
--- a/typings/primordials.d.ts
+++ b/typings/primordials.d.ts
@@ -24,7 +24,7 @@ type StaticApply<T extends (this: unknown, ...args: unknown[]) => unknown> =
  * primordials.StringPrototypeStartsWith('thing', 'hello')
  * ```
  */
-declare namespace primordials {
+declare namespace Primordials {
   export function uncurryThis<
       T extends (...args: unknown[]) => unknown
     > (fn: T):
@@ -527,3 +527,7 @@ declare namespace primordials {
   export const PromisePrototypeCatch: UncurryThis<typeof Promise.prototype.catch>
   export const PromisePrototypeFinally: UncurryThis<typeof Promise.prototype.finally>
 }
+
+declare global {
+  const primordials: typeof Primordials;
+}