diff --git a/src/user.js b/src/user.js
index b7afa4173..52efcd0fb 100644
--- a/src/user.js
+++ b/src/user.js
@@ -264,8 +264,10 @@ function verifyWithEmail(email, password, callback) {
     assert.strictEqual(typeof password, 'string');
     assert.strictEqual(typeof callback, 'function');
 
+    email = email.toLowerCase();
+
     function checkWithEmailFromDatabase() {
-        userdb.getByEmail(email.toLowerCase(), function (error, user) {
+        userdb.getByEmail(email, function (error, user) {
             if (error && error.reason == DatabaseError.NOT_FOUND) return callback(new UserError(UserError.NOT_FOUND));
             if (error) return callback(new UserError(UserError.INTERNAL_ERROR, error));