diff --git a/runtime/js/30_os.js b/runtime/js/30_os.js
index 3c9768593b..ccce946a5f 100644
--- a/runtime/js/30_os.js
+++ b/runtime/js/30_os.js
@@ -25,8 +25,10 @@
     return ops.op_os_release();
   }
 
-  function osUptime() {
-    return ops.op_os_uptime();
+  function createOsUptime(opFn) {
+    return function osUptime() {
+      return opFn();
+    };
   }
 
   function systemMemoryInfo() {
@@ -110,7 +112,7 @@
     loadavg,
     networkInterfaces,
     osRelease,
-    osUptime,
+    createOsUptime,
     setExitHandler,
     systemMemoryInfo,
     uid,
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index 901cb136fe..6ecf23ffff 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -483,6 +483,7 @@ delete Intl.v8BreakIterator;
           ops.op_node_unstable_net_listen_udp,
           ops.op_node_unstable_net_listen_unixpacket,
         ),
+        osUptime: __bootstrap.os.createOsUptime(ops.op_node_unstable_os_uptime),
       },
     });
 
@@ -518,6 +519,7 @@ delete Intl.v8BreakIterator;
           ops.op_net_listen_udp,
           ops.op_net_listen_unixpacket,
         ),
+        osUptime: __bootstrap.os.createOsUptime(ops.op_os_uptime),
       });
     }
 
@@ -622,6 +624,7 @@ delete Intl.v8BreakIterator;
           ops.op_node_unstable_net_listen_udp,
           ops.op_node_unstable_net_listen_unixpacket,
         ),
+        osUptime: __bootstrap.os.createOsUptime(ops.op_node_unstable_os_uptime),
       },
     });
 
@@ -649,6 +652,7 @@ delete Intl.v8BreakIterator;
           ops.op_net_listen_udp,
           ops.op_net_listen_unixpacket,
         ),
+        osUptime: __bootstrap.os.createOsUptime(ops.op_os_uptime),
       });
     }
     ObjectDefineProperties(finalDenoNs, {
diff --git a/runtime/ops/os/mod.rs b/runtime/ops/os/mod.rs
index e82afbf7cd..f6f4761dfc 100644
--- a/runtime/ops/os/mod.rs
+++ b/runtime/ops/os/mod.rs
@@ -30,6 +30,7 @@ fn init_ops(builder: &mut ExtensionBuilder) -> &mut ExtensionBuilder {
     op_network_interfaces::decl(),
     op_os_release::decl(),
     op_os_uptime::decl(),
+    op_node_unstable_os_uptime::decl(),
     op_set_env::decl(),
     op_set_exit_code::decl(),
     op_system_memory_info::decl(),
@@ -425,12 +426,21 @@ fn rss() -> usize {
   }
 }
 
-#[op]
-fn op_os_uptime(state: &mut OpState) -> Result<u64, AnyError> {
-  super::check_unstable(state, "Deno.osUptime");
+fn os_uptime(state: &mut OpState) -> Result<u64, AnyError> {
   state
     .borrow_mut::<Permissions>()
     .sys
     .check("osUptime", Some("Deno.osUptime()"))?;
   Ok(sys_info::os_uptime())
 }
+
+#[op]
+fn op_os_uptime(state: &mut OpState) -> Result<u64, AnyError> {
+  super::check_unstable(state, "Deno.osUptime");
+  os_uptime(state)
+}
+
+#[op]
+fn op_node_unstable_os_uptime(state: &mut OpState) -> Result<u64, AnyError> {
+  os_uptime(state)
+}
diff --git a/runtime/ops/os/sys_info.rs b/runtime/ops/os/sys_info.rs
index ecb40b9a04..91422546c8 100644
--- a/runtime/ops/os/sys_info.rs
+++ b/runtime/ops/os/sys_info.rs
@@ -302,6 +302,8 @@ pub fn mem_info() -> Option<MemInfo> {
 }
 
 pub fn os_uptime() -> u64 {
+  let mut uptime: u64 = 0;
+
   #[cfg(target_os = "linux")]
   {
     let mut info = std::mem::MaybeUninit::uninit();
@@ -310,7 +312,7 @@ pub fn os_uptime() -> u64 {
     if res == 0 {
       // SAFETY: `sysinfo` initializes the struct.
       let info = unsafe { info.assume_init() };
-      return info.uptime as u64;
+      uptime = info.uptime as u64;
     }
   }
 
@@ -340,7 +342,7 @@ pub fn os_uptime() -> u64 {
       )
     };
     if res == 0 {
-      return SystemTime::now()
+      uptime = SystemTime::now()
         .duration_since(SystemTime::UNIX_EPOCH)
         .map(|d| {
           (d - Duration::new(
@@ -357,8 +359,8 @@ pub fn os_uptime() -> u64 {
   unsafe {
     // Windows is the only one that returns `uptime` in milisecond precision,
     // so we need to get the seconds out of it to be in sync with other envs.
-    return unsafe { winapi::um::sysinfoapi::GetTickCount64() as u64 / 1000 };
+    uptime = winapi::um::sysinfoapi::GetTickCount64() as u64 / 1000;
   }
 
-  0
+  uptime
 }