diff --git a/plugins/Authentication/Saml/adSAML.php b/plugins/Authentication/Saml/adSAML.php
index e54b4a431..573abd406 100644
--- a/plugins/Authentication/Saml/adSAML.php
+++ b/plugins/Authentication/Saml/adSAML.php
@@ -111,6 +111,7 @@ public function authenticate()
             $this->userAttributes = $this->authSimple->getAttributes();
             $returnValue = true;
         }
+        SimpleSAML_Session::getSessionFromRequest()->cleanup(); // Reverts to our PHP session
         return $returnValue;
     }