diff --git a/cairo.spec b/cairo.spec
index b5ffc36..24784a1 100644
--- a/cairo.spec
+++ b/cairo.spec
@@ -52,7 +52,7 @@ through the X Render Extension or OpenGL).
 %package devel
 Summary: Development files for cairo
 Group: Development/Libraries
-Requires: %{name} = %{version}-%{release}
+Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
 Cairo is a 2D graphics library designed to provide high-quality display
@@ -64,7 +64,7 @@ needed for developing software which uses the cairo graphics library.
 %package gobject
 Summary: GObject bindings for cairo
 Group: System Environment/Libraries
-Requires: %{name} = %{version}-%{release}
+Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description gobject
 Cairo is a 2D graphics library designed to provide high-quality display
@@ -76,8 +76,8 @@ integrate well with the GObject object system used by GNOME.
 %package gobject-devel
 Summary: Development files for cairo-gobject
 Group: Development/Libraries
-Requires: %{name}-devel = %{version}-%{release}
-Requires: %{name}-gobject = %{version}-%{release}
+Requires: %{name}-devel%{?_isa} = %{version}-%{release}
+Requires: %{name}-gobject%{?_isa} = %{version}-%{release}
 
 %description gobject-devel
 Cairo is a 2D graphics library designed to provide high-quality display
@@ -190,6 +190,7 @@ rm $RPM_BUILD_ROOT%{_libdir}/*.la
 * Tue Oct 14 2014 Kalev Lember <kalevlember@gmail.com> - 1.13.1-0.5.git337ab1f
 - Minor spec file cleanup:
 - Drop manual -devel subpackage deps
+- Tighten deps with the _isa macro
 
 * Fri Aug 15 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.13.1-0.4.git337ab1f
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_22_Mass_Rebuild