diff --git a/pkcs11-helper.spec b/pkcs11-helper.spec
index 766644a..84615fc 100644
--- a/pkcs11-helper.spec
+++ b/pkcs11-helper.spec
@@ -23,7 +23,7 @@ using a simple API.
 
 %package        devel
 Summary:        Development files for pkcs11-helper
-Requires:       %{name} = %{version}-%{release}
+Requires:       %{name}%{?_isa} = %{version}-%{release}
 Requires:       openssl-devel
 # for /usr/share/aclocal
 Requires:       automake
@@ -78,6 +78,7 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 - Use make_build and make_install macros
 - Tighten soname globs
 - Use license macro for COPYING*
+- Tighten requires with _isa macro
 
 * Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.22-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild