diff --git a/synapse/handlers/saml_handler.py b/synapse/handlers/saml_handler.py
index 0082f85c2..96f3d016f 100644
--- a/synapse/handlers/saml_handler.py
+++ b/synapse/handlers/saml_handler.py
@@ -24,6 +24,7 @@ from saml2.client import Saml2Client
 from synapse.api.errors import SynapseError
 from synapse.config import ConfigError
 from synapse.http.servlet import parse_string
+from synapse.module_api import ModuleApi
 from synapse.rest.client.v1.login import SSOAuthHandler
 from synapse.types import (
     UserID,
@@ -59,7 +60,8 @@ class SamlHandler:
 
         # plugin to do custom mapping from saml response to mxid
         self._user_mapping_provider = hs.config.saml2_user_mapping_provider_class(
-            hs.config.saml2_user_mapping_provider_config
+            hs.config.saml2_user_mapping_provider_config,
+            ModuleApi(hs, hs.get_auth_handler()),
         )
 
         # identifier for the external_ids table
@@ -265,11 +267,12 @@ class SamlConfig(object):
 class DefaultSamlMappingProvider(object):
     __version__ = "0.0.1"
 
-    def __init__(self, parsed_config: SamlConfig):
+    def __init__(self, parsed_config: SamlConfig, module_api: ModuleApi):
         """The default SAML user mapping provider
 
         Args:
             parsed_config: Module configuration
+            module_api: module api proxy
         """
         self._mxid_source_attribute = parsed_config.mxid_source_attribute
         self._mxid_mapper = parsed_config.mxid_mapper