diff --git a/examples/client/async/latency_client.py b/examples/client/async/latency_client.py
index 8f39549..57be604 100644
--- a/examples/client/async/latency_client.py
+++ b/examples/client/async/latency_client.py
@@ -21,7 +21,6 @@ async def connect():
 
 @sio.event
 async def pong_from_server():
-    global start_timer
     latency = time.time() - start_timer
     print(f'latency is {latency * 1000:.2f} ms')
     await sio.sleep(1)
diff --git a/examples/client/sync/latency_client.py b/examples/client/sync/latency_client.py
index 240d214..94dcec9 100644
--- a/examples/client/sync/latency_client.py
+++ b/examples/client/sync/latency_client.py
@@ -19,7 +19,6 @@ def connect():
 
 @sio.event
 def pong_from_server():
-    global start_timer
     latency = time.time() - start_timer
     print(f'latency is {latency * 1000:.2f} ms')
     sio.sleep(1)