diff --git a/manifests/lib/java.pp b/manifests/lib/java.pp
index 0a2d45f..cc831f1 100644
--- a/manifests/lib/java.pp
+++ b/manifests/lib/java.pp
@@ -1,16 +1,14 @@
 # This class installs the postgresql jdbc connector. See README.md for more
 # details.
 class postgresql::lib::java (
-  $package_name   = $postgresql::params::java_package_name,
-  $package_ensure = 'present'
+  String $package_name = $postgresql::params::java_package_name,
+  $package_ensure      = 'present'
 ) inherits postgresql::params {
 
-  validate_string($package_name)
-
   package { 'postgresql-jdbc':
     ensure => $package_ensure,
     name   => $package_name,
     tag    => 'postgresql',
   }
 
 }