diff --git a/icinga.py b/icinga.py
index deb176b..015ddef 100644
--- a/icinga.py
+++ b/icinga.py
@@ -4,7 +4,7 @@ environment = jinja2.Environment(loader=jinja2.FileSystemLoader(searchpath="./te
 def createMasterHostConfig(vmList):
     template = environment.get_template("icinga_host.conf.j2") 
     with open("ansible/files/icinga_master_hosts.conf", "w") as f:
-        for vmo in vmList:
+        for vmo in set(vmList):
 
             if not vmo.check:
                 continue