diff --git a/inventory/host_vars/copr-fe.cloud.fedoraproject.org b/inventory/host_vars/copr-fe.cloud.fedoraproject.org
index 7ffa52839a..557e0e3d12 100644
--- a/inventory/host_vars/copr-fe.cloud.fedoraproject.org
+++ b/inventory/host_vars/copr-fe.cloud.fedoraproject.org
@@ -1,6 +1,6 @@
 ---
 # this overrides vars/Fedora.yml
-base_pkgs_erase: 'PackageKit*', 'sendmail', 'at']
+base_pkgs_erase: ['PackageKit*', 'sendmail', 'at']
 
 instance_type: ms1.medium
 image: "{{ fedora21_x86_64 }}"