diff --git a/python-Telethon.spec b/python-Telethon.spec
index 3381de0..a80e37c 100644
--- a/python-Telethon.spec
+++ b/python-Telethon.spec
@@ -35,6 +35,7 @@ BuildRequires:  %{python_module rsa}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
+Requires:       python-pyaes
 Requires:       python-rsa
 BuildArch:      noarch
 %python_subpackages