1 files changed, 1 insertions, 2 deletions
diff --git a/Lib/mutex.py b/Lib/mutex.py
index 47d2ca2..e15710a 100644
--- a/Lib/mutex.py
+++ b/Lib/mutex.py
@@ -44,8 +44,7 @@ class mutex:
         """Unlock a mutex.  If the queue is not empty, call the next
         function with its argument."""
         if self.queue:
-            function, argument = self.queue[0]
-            del self.queue[0]
+            function, argument = self.queue.pop(0)
             function(argument)
         else:
             self.locked = 0