diff --git a/cairomm.spec b/cairomm.spec
index ab969d3..814d784 100644
--- a/cairomm.spec
+++ b/cairomm.spec
@@ -26,7 +26,7 @@ Standard Template Library where it makes sense.
 %package        devel
 Summary:        Headers for developing programs that will use %{name}
 Group:          Development/Libraries
-Requires:       %{name} = %{version}-%{release}
+Requires:       %{name}%{?_isa} = %{version}-%{release}
 
 %description    devel
 Cairomm is the C++ API for the cairo graphics library. It offers all the power
@@ -89,6 +89,7 @@ find $RPM_BUILD_ROOT -type f -name "*.la" -exec rm -f {} ';'
 - Update to 1.12.0
 - Drop manual requires that are automatically handled by pkgconfig dep gen
 - Use license macro for COPYING
+- Tighten -devel subpackage deps with the _isa macro
 
 * Wed Jun 17 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.10.0-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild