diff --git a/roles/nagios_server/tasks/main.yml b/roles/nagios_server/tasks/main.yml
index ec6fa5616d..79d85076b7 100644
--- a/roles/nagios_server/tasks/main.yml
+++ b/roles/nagios_server/tasks/main.yml
@@ -31,7 +31,7 @@
   - mod_auth_openid
 
 - name: Copy /etc/nagios config
-  synchronize: archive=yes src={{srcdir}}/ dest=/etc/nagios owner=nagios group=nagios
+  synchronize: archive=yes src={{srcdir|string}}/ dest=/etc/nagios owner=nagios group=nagios
   tags:
   - nagios-config