diff --git a/tokio/src/sync/semaphore.rs b/tokio/src/sync/semaphore.rs
index 2d3ac3ca8..b4304d60d 100644
--- a/tokio/src/sync/semaphore.rs
+++ b/tokio/src/sync/semaphore.rs
@@ -280,6 +280,11 @@ impl Semaphore {
     pub fn close(&self) {
         self.ll_sem.close();
     }
+
+    /// Returns true if the semaphore is closed
+    pub fn is_closed(&self) -> bool {
+        self.ll_sem.is_closed()
+    }
 }
 
 impl<'a> SemaphorePermit<'a> {