diff --git a/cli/diagnostics.rs b/cli/diagnostics.rs
index 59c7f9737b..0fd8a0c5c7 100644
--- a/cli/diagnostics.rs
+++ b/cli/diagnostics.rs
@@ -18,7 +18,6 @@ const UNSTABLE_DENO_PROPS: &[&str] = &[
   "CreateHttpClientOptions",
   "DatagramConn",
   "HttpClient",
-  "SystemMemoryInfo",
   "UnixConnectOptions",
   "UnixListenOptions",
   "bench",
@@ -31,7 +30,6 @@ const UNSTABLE_DENO_PROPS: &[&str] = &[
   "ppid",
   "removeSignalListener",
   "shutdown",
-  "systemMemoryInfo",
   "umask",
   "spawnChild",
   "Child",
diff --git a/cli/dts/lib.deno.ns.d.ts b/cli/dts/lib.deno.ns.d.ts
index b64e78af2e..43c46754b1 100644
--- a/cli/dts/lib.deno.ns.d.ts
+++ b/cli/dts/lib.deno.ns.d.ts
@@ -369,6 +369,49 @@ declare namespace Deno {
    */
   export function networkInterfaces(): NetworkInterfaceInfo[];
 
+  /**
+   * Displays the total amount of free and used physical and swap memory in the
+   * system, as well as the buffers and caches used by the kernel.
+   *
+   * This is similar to the `free` command in Linux
+   *
+   * ```ts
+   * console.log(Deno.systemMemoryInfo());
+   * ```
+   *
+   * Requires `allow-sys` permission.
+   *
+   * @tags allow-sys
+   * @category Runtime Environment
+   */
+  export function systemMemoryInfo(): SystemMemoryInfo;
+
+  /**
+   * Information returned from a call to {@linkcode Deno.systemMemoryInfo}.
+   *
+   * @category Runtime Environment
+   */
+  export interface SystemMemoryInfo {
+    /** Total installed memory in bytes. */
+    total: number;
+    /** Unused memory in bytes. */
+    free: number;
+    /** Estimation of how much memory, in bytes, is available for starting new
+     * applications, without swapping. Unlike the data provided by the cache or
+     * free fields, this field takes into account page cache and also that not
+     * all reclaimable memory will be reclaimed due to items being in use.
+     */
+    available: number;
+    /** Memory used by kernel buffers. */
+    buffers: number;
+    /** Memory used by the page cache and slabs. */
+    cached: number;
+    /** Total swap memory. */
+    swapTotal: number;
+    /** Unused swap memory. */
+    swapFree: number;
+  }
+
   /** Reflects the `NO_COLOR` environment variable at program start.
    *
    * When the value is `true`, the Deno CLI will attempt to not send color codes
diff --git a/cli/dts/lib.deno.unstable.d.ts b/cli/dts/lib.deno.unstable.d.ts
index 6c8497cec1..94fc0b5d64 100644
--- a/cli/dts/lib.deno.unstable.d.ts
+++ b/cli/dts/lib.deno.unstable.d.ts
@@ -269,51 +269,6 @@ declare namespace Deno {
    */
   export function umask(mask?: number): number;
 
-  /** **UNSTABLE**: New API, yet to be vetted.
-   *
-   * Displays the total amount of free and used physical and swap memory in the
-   * system, as well as the buffers and caches used by the kernel.
-   *
-   * This is similar to the `free` command in Linux
-   *
-   * ```ts
-   * console.log(Deno.systemMemoryInfo());
-   * ```
-   *
-   * Requires `allow-sys` permission.
-   *
-   * @tags allow-sys
-   * @category Runtime Environment
-   */
-  export function systemMemoryInfo(): SystemMemoryInfo;
-
-  /** **UNSTABLE**: New API, yet to be vetted.
-   *
-   * Information returned from a call to {@linkcode Deno.systemMemoryInfo}.
-   *
-   * @category Runtime Environment
-   */
-  export interface SystemMemoryInfo {
-    /** Total installed memory in bytes. */
-    total: number;
-    /** Unused memory in bytes. */
-    free: number;
-    /** Estimation of how much memory, in bytes, is available for starting new
-     * applications, without swapping. Unlike the data provided by the cache or
-     * free fields, this field takes into account page cache and also that not
-     * all reclaimable memory will be reclaimed due to items being in use.
-     */
-    available: number;
-    /** Memory used by kernel buffers. */
-    buffers: number;
-    /** Memory used by the page cache and slabs. */
-    cached: number;
-    /** Total swap memory. */
-    swapTotal: number;
-    /** Unused swap memory. */
-    swapFree: number;
-  }
-
   /** **UNSTABLE**: New API, yet to be vetted.
    *
    * Returns the user id of the Deno process on POSIX platforms. Returns `null`
diff --git a/runtime/js/90_deno_ns.js b/runtime/js/90_deno_ns.js
index a0587c7f60..8111698be6 100644
--- a/runtime/js/90_deno_ns.js
+++ b/runtime/js/90_deno_ns.js
@@ -121,13 +121,13 @@
     unrefTimer: __bootstrap.timers.unrefTimer,
     osRelease: __bootstrap.os.osRelease,
     hostname: __bootstrap.os.hostname,
+    systemMemoryInfo: __bootstrap.os.systemMemoryInfo,
     networkInterfaces: __bootstrap.os.networkInterfaces,
     consoleSize: __bootstrap.tty.consoleSize,
   };
 
   __bootstrap.denoNsUnstable = {
     DiagnosticCategory: __bootstrap.diagnostics.DiagnosticCategory,
-    systemMemoryInfo: __bootstrap.os.systemMemoryInfo,
     gid: __bootstrap.os.gid,
     uid: __bootstrap.os.uid,
     listenDatagram: __bootstrap.net.listenDatagram,
diff --git a/runtime/ops/os/mod.rs b/runtime/ops/os/mod.rs
index 275461cc1a..1bc140d444 100644
--- a/runtime/ops/os/mod.rs
+++ b/runtime/ops/os/mod.rs
@@ -245,7 +245,6 @@ impl From<netif::Interface> for NetworkInterface {
 fn op_system_memory_info(
   state: &mut OpState,
 ) -> Result<Option<sys_info::MemInfo>, AnyError> {
-  super::check_unstable(state, "Deno.systemMemoryInfo");
   state
     .borrow_mut::<Permissions>()
     .sys