diff --git a/testcloud.spec b/testcloud.spec
index 620c3d3..8692038 100644
--- a/testcloud.spec
+++ b/testcloud.spec
@@ -4,11 +4,12 @@
 # sitelib for noarch packages, sitearch for others (remove the unneeded one)
 %{!?python_sitelib: %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")}
 
+ExclusiveArch: %{kernel_arches} noarch
 
 Name:           testcloud
 # Update also version in testcloud/__init__.py and docs/source/conf.py when changing this!
 Version:        0.3.5
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Tool for running cloud images locally
 
 License:        GPLv2+
@@ -114,6 +115,9 @@ rm -rf %{buildroot}%{_sysconfdir}/testcloud/__pycache__
 %{python3_sitelib}/*.egg-info
 
 %changelog
+* Thu Aug 27 2020 Frantisek Zatloukal <fzatlouk@redhat.com> - 0.3.5-4
+- ExclusiveArch to prevent koji from trying to build this on i686
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.5-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild