diff --git a/manifests/install.pp b/manifests/install.pp
index aaacafc..938a89b 100644
--- a/manifests/install.pp
+++ b/manifests/install.pp
@@ -1,68 +1,66 @@
 # Class: zookeeper::install
 #
 # This module manages installation tasks.
 #
 # PRIVATE CLASS - do not use directly (use main `zookeeper` class).
 class zookeeper::install inherits zookeeper {
   anchor { 'zookeeper::install::begin': }
 
   $os_family = $facts['os']['family']
 
   # Java installation
   if ($zookeeper::install_java) {
     if !$zookeeper::java_package {
       fail('Java installation is required, but no java package was provided.')
     }
 
-    validate_string($zookeeper::java_package)
-
     # Make sure the Java package is only installed once.
     anchor { 'zookeeper::install::java': }
 
     ensure_resource('package', $zookeeper::java_package,
       { 'ensure'        => $zookeeper::ensure,
         'allow_virtual' => true,
         'before'        => Anchor['zookeeper::install::intermediate'],
         'require'       => Anchor['zookeeper::install::begin']
       }
     )
   }
 
   anchor { 'zookeeper::install::intermediate': }
 
   # Package installation
   case $zookeeper::install_method {
     'archive': {
       include zookeeper::install::archive
       Anchor['zookeeper::install::intermediate']
       -> Class['zookeeper::install::archive']
       -> Anchor['zookeeper::install::end']
     }
     'package': {
       # Repo management
       case $os_family {
         'RedHat', 'Suse': {
           include zookeeper::install::repo
           Anchor['zookeeper::install::begin']
           -> Class['zookeeper::install::repo']
         }
         default: {} # nothing to do
       }
 
       include zookeeper::install::package
       Anchor['zookeeper::install::intermediate']
       -> Class['zookeeper::install::package']
       -> Anchor['zookeeper::install::end']
     }
     default: {
       fail('Valid installation methods are `package` or `archive`')
     }
   }
 
   anchor { 'zookeeper::install::end': }
 
   # Post installation tasks
   class { 'zookeeper::post_install':
     require => Anchor['zookeeper::install::end'],
   }
 }