diff --git a/src/common/tools/mutex_queues/MutexQueues.py b/src/common/tools/mutex_queues/MutexQueues.py
index 50074cd4a5b8efc2bf008419fe42cce2bb0f745a..e1843250093b9ac8c6ce4046f627e2d5251fba55 100644
--- a/src/common/tools/mutex_queues/MutexQueues.py
+++ b/src/common/tools/mutex_queues/MutexQueues.py
@@ -78,7 +78,7 @@ class MutexQueues:
             
             # remove myself from the queue
             try:
-                mutex = queue.get(block=True, timeout=0.1)
+                queue.get(block=True, timeout=0.1)
             except Empty:
                 pass