diff --git a/asyncstdlib/heapq.py b/asyncstdlib/heapq.py
index ac2f5e7..a949bb0 100644
--- a/asyncstdlib/heapq.py
+++ b/asyncstdlib/heapq.py
@@ -99,6 +99,9 @@ async def pull_head(self) -> bool:
     def __lt__(self, other: "_KeyIter[LT]") -> bool:
         return self.reverse ^ (self.head_key < other.head_key)
 
+    def __eq__(self, other: "_KeyIter[LT]") -> bool:  # type: ignore[override]
+        return not (self.head_key < other.head_key or other.head_key < self.head_key)
+
 
 @overload
 def merge(