diff --git a/dyxless/auth.py b/dyxless/auth.py
index 19acda2..b659397 100644
--- a/dyxless/auth.py
+++ b/dyxless/auth.py
@@ -82,7 +82,7 @@ def signup():
             )
             return redirect(url_for("auth.signup"))
 
-        user = User.query.filter_by(email=username).first()
+        user = User.query.filter_by(username=username).first()
 
         if user:
             flash("Указанное имя уже используется", "is-danger")