diff --git a/Lib/asyncio/locks.py b/Lib/asyncio/locks.py
index fa3a94764b507ae..0d5e362188ab21d 100644
--- a/Lib/asyncio/locks.py
+++ b/Lib/asyncio/locks.py
@@ -145,10 +145,7 @@ def _wake_up_first(self):
         """Ensure that the first waiter will wake up."""
         if not self._waiters:
             return
-        try:
-            fut = next(iter(self._waiters))
-        except StopIteration:
-            return
+        fut = next(iter(self._waiters))
 
         # .done() means that the waiter is already set to wake up.
         if not fut.done():