diff --git a/manifests/init.pp b/manifests/init.pp
index d40b0f8..98e015b 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -51,7 +51,7 @@ class java(
 ) {
   include java::params
 
-  validate_re($version, 'present|installed|latest|^[.+_0-9a-zA-Z:-]+$')
+  validate_re($version, 'present|installed|latest|^[.+_0-9a-zA-Z:~-]+$')
   
   if $package_options != undef {
     validate_array($package_options)