diff --git a/lib/web/auth/saml/index.js b/lib/web/auth/saml/index.js
index 14f3966d7..c48b93e29 100644
--- a/lib/web/auth/saml/index.js
+++ b/lib/web/auth/saml/index.js
@@ -85,7 +85,7 @@ passport.use(new SamlStrategy({
       }
     }
   }).catch(function (err) {
-    logger.error('saml auth failed: ' + err)
+    logger.error('saml auth failed: ' + err.message)
     return done(err, null)
   })
 }))