diff --git a/manifests/params.pp b/manifests/params.pp
index 8e74396..a55e14c 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -3,7 +3,7 @@
 # Author: Arne Teuke (arne_teuke@confdroid.com)
 # @param [String] pl_server_fqdn the fqdn of the postgresql server. Any other
 #   system will be configured as client
-# @param [String] reqpackages_server the packages for the server
+# @param [Array] reqpackages_server the packages for the server
 # @param [String] reqpackages_client the packages for the client
 # @param [String] pkg_ensure which version of the packages to install, i.e.
 #   'latest', 'present' '13.20',
@@ -21,7 +21,7 @@ class postgresql_cd::params (
   String $pl_server_fqdn    = undef,
 
   # installation
-  String $reqpackages_server      = 'postgresql-server',
+  Array $reqpackages_server      = ['postgresql-server','postgresql-contrib'],
   String $reqpackages_client      = 'postgresql',
   String $pkg_ensure              = 'latest',