diff --git a/pyinfra/server/server.py b/pyinfra/server/server.py
index 2054ebb..65396f7 100644
--- a/pyinfra/server/server.py
+++ b/pyinfra/server/server.py
@@ -59,7 +59,7 @@ def __set_up_processing_server_impl(operation2function: Dict[str, QueuedStreamFu
     pickup_operation2processor = {pickup_suffix(op): prc for op, prc in operation2processor.items()}
     operation2processor = merge(submit_operation2processor, pickup_operation2processor)
 
-    pickup_operation2metric = {op: make_summary_instance(op) for op in operation2processor}
+    operation2metric = {op: make_summary_instance(op) for op in operation2processor}
 
     @app.route("/ready", methods=["GET"])
     def ready():
@@ -83,7 +83,7 @@ def __set_up_processing_server_impl(operation2function: Dict[str, QueuedStreamFu
 
     @app.route("/<operation>", methods=["GET"])
     def pickup(operation):
-        with pickup_operation2metric[operation.replace("_pickup", "")].time():
+        with operation2metric[operation.replace("_pickup", "")].time():
             return operation2processor[operation].pop()
 
     return app