diff --git a/manifests/config.pp b/manifests/config.pp
index 61ee139..b99af02 100644
--- a/manifests/config.pp
+++ b/manifests/config.pp
@@ -26,7 +26,7 @@ class mistral::config (
 
   include ::mistral::deps
 
-  validate_hash($mistral_config)
+  validate_legacy(Hash, 'validate_hash', $mistral_config)
 
   create_resources('mistral_config', $mistral_config)
 }
diff --git a/manifests/db.pp b/manifests/db.pp
index f584ca3..7aac4a2 100644
--- a/manifests/db.pp
+++ b/manifests/db.pp
@@ -66,8 +66,8 @@ class mistral::db (
   $database_retry_interval_real = pick($::mistral::database_retry_interval,$database_retry_interval)
   $database_max_overflow_real   = pick($::mistral::database_max_overflow,$database_max_overflow)
 
-  validate_re($database_connection_real,
-    '^(sqlite|mysql(\+pymysql)?|postgresql):\/\/(\S+:\S+@\S+\/\S+)?')
+  validate_legacy(Oslo::Dbconn, 'validate_re', $database_connection_real,
+    ['^(sqlite|mysql(\+pymysql)?|postgresql):\/\/(\S+:\S+@\S+\/\S+)?'])
 
   oslo::db { 'mistral_config':
     connection     => $database_connection_real,
diff --git a/manifests/db/mysql.pp b/manifests/db/mysql.pp
index b0995b6..e826c25 100644
--- a/manifests/db/mysql.pp
+++ b/manifests/db/mysql.pp
@@ -45,7 +45,7 @@ class mistral::db::mysql(
 
   include ::mistral::deps
 
-  validate_string($password)
+  validate_legacy(String, 'validate_string', $password)
 
   ::openstacklib::db::mysql { 'mistral':
     user          => $user,
diff --git a/manifests/keystone/auth.pp b/manifests/keystone/auth.pp
index 727ef97..6e05af9 100644
--- a/manifests/keystone/auth.pp
+++ b/manifests/keystone/auth.pp
@@ -83,7 +83,7 @@ class mistral::keystone::auth(
 
   include ::mistral::deps
 
-  validate_string($password)
+  validate_legacy(String, 'validate_string', $password)
 
   keystone::resource::service_identity { 'mistral':
     configure_user      => $configure_user,
diff --git a/manifests/policy.pp b/manifests/policy.pp
index 701e36f..3ddddc7 100644
--- a/manifests/policy.pp
+++ b/manifests/policy.pp
@@ -31,7 +31,7 @@ class mistral::policy (
   include ::mistral::deps
   include ::mistral::params
 
-  validate_hash($policies)
+  validate_legacy(Hash, 'validate_hash', $policies)
 
   Openstacklib::Policy::Base {
     file_path  => $policy_path,