diff --git a/roles/nameserver/tasks/install_powerdns_server.yml b/roles/nameserver/tasks/install_powerdns_server.yml
index e82b20e..d394a65 100644
--- a/roles/nameserver/tasks/install_powerdns_server.yml
+++ b/roles/nameserver/tasks/install_powerdns_server.yml
@@ -12,7 +12,7 @@
 - name: nameserver | powerdns-server | install and configure database
   block:
     - set_fact:
-      key_value: mysql=True
+      mysql: True
     - include_role:
       name: database # required. The name of the role to be executed.
     - name: nameserver | powerdns-server | create database