diff --git a/tokio/src/runtime/io/driver.rs b/tokio/src/runtime/io/driver.rs
index 0f7b1e57a..1dd93427f 100644
--- a/tokio/src/runtime/io/driver.rs
+++ b/tokio/src/runtime/io/driver.rs
@@ -13,6 +13,7 @@ use crate::runtime::io::{IoDriverMetrics, RegistrationSet, ScheduledIo};
 use mio::event::Source;
 use std::fmt;
 use std::io;
+use std::os::fd::AsRawFd;
 use std::sync::Arc;
 use std::time::Duration;
 
@@ -209,6 +210,11 @@ impl Handle {
         self.waker.wake().expect("failed to wake I/O driver");
     }
 
+    #[cfg(unix)]
+    pub(crate) fn get_raw_poll_fd(&self) -> std::os::fd::RawFd {
+        self.registry.as_raw_fd()
+    }
+
     /// Registers an I/O resource with the reactor for a given `mio::Ready` state.
     ///
     /// The registration token is returned.
diff --git a/tokio/src/runtime/runtime.rs b/tokio/src/runtime/runtime.rs
index 16f8718ab..5ac7632d8 100644
--- a/tokio/src/runtime/runtime.rs
+++ b/tokio/src/runtime/runtime.rs
@@ -475,6 +475,17 @@ impl Runtime {
     pub fn metrics(&self) -> crate::runtime::RuntimeMetrics {
         self.handle.metrics()
     }
+
+    /// Gets a raw fd for the IO driver which can be polled.
+    ///
+    /// Do NOT use this for anything other than watching it with epoll/kqueue/poll.
+    ///
+    /// # Safety
+    /// Don't use this after the runtime goes away.
+    #[cfg(unix)]
+    pub unsafe fn get_raw_poll_fd(&self) -> Option<std::os::fd::RawFd> {
+        Some(self.handle.inner.driver().io.as_ref()?.get_raw_poll_fd())
+    }
 }
 
 #[allow(clippy::single_match)] // there are comments in the error branch, so we don't want if-let