diff --git a/prometheuspvesd/discovery.py b/prometheuspvesd/discovery.py
index 17e825f..1e950d4 100644
--- a/prometheuspvesd/discovery.py
+++ b/prometheuspvesd/discovery.py
@@ -142,7 +142,7 @@ class Discovery():
             if obj["status"] in map(str, self.config.config["exclude_state"]):
                 continue
 
-            if obj["vmid"] in map(str, self.config.config["exclude_vmid"]):
+            if str(obj["vmid"]) in self.config.config["exclude_vmid"]:
                 continue
 
             filtered.append(item.copy())