diff --git a/manifests/config.pp b/manifests/config.pp
index 51359892..6c3d39cf 100644
--- a/manifests/config.pp
+++ b/manifests/config.pp
@@ -30,8 +30,8 @@ class sahara::config (
 
   include ::sahara::deps
 
-  validate_hash($sahara_config)
-  validate_hash($sahara_api_paste_ini)
+  validate_legacy(Hash, 'validate_hash', $sahara_config)
+  validate_legacy(Hash, 'validate_hash', $sahara_api_paste_ini)
 
   create_resources('sahara_config', $sahara_config)
   create_resources('sahara_api_paste_ini', $sahara_api_paste_ini)
diff --git a/manifests/db.pp b/manifests/db.pp
index b42a178f..4817bf5c 100644
--- a/manifests/db.pp
+++ b/manifests/db.pp
@@ -66,8 +66,8 @@ class sahara::db (
   $database_retry_interval_real = pick($::sahara::database_retry_interval, $database_retry_interval)
   $database_max_overflow_real   = pick($::sahara::database_max_overflow, $database_max_overflow)
 
-  validate_re($database_connection_real,
-    '^(mysql(\+pymysql)?|postgresql):\/\/(\S+:\S+@\S+\/\S+)?')
+  validate_legacy(Oslo::Dbconn, 'validate_re', $database_connection_real,
+    ['^(mysql(\+pymysql)?|postgresql):\/\/(\S+:\S+@\S+\/\S+)?'])
 
   oslo::db { 'sahara_config':
     db_max_retries => $database_db_max_retries,
diff --git a/manifests/db/mysql.pp b/manifests/db/mysql.pp
index ce7b1def..356c0807 100644
--- a/manifests/db/mysql.pp
+++ b/manifests/db/mysql.pp
@@ -44,7 +44,7 @@ class sahara::db::mysql(
 
   include ::sahara::deps
 
-  validate_string($password)
+  validate_legacy(String, 'validate_string', $password)
 
   ::openstacklib::db::mysql{ 'sahara':
     user          => $user,
diff --git a/manifests/policy.pp b/manifests/policy.pp
index fa5c4b0b..50745699 100644
--- a/manifests/policy.pp
+++ b/manifests/policy.pp
@@ -31,7 +31,7 @@ class sahara::policy (
   include ::sahara::deps
   include ::sahara::params
 
-  validate_hash($policies)
+  validate_legacy(Hash, 'validate_hash', $policies)
 
   Openstacklib::Policy::Base {
     file_path  => $policy_path,