diff --git a/json-glib.spec b/json-glib.spec
index 3209ea3..bba4b24 100644
--- a/json-glib.spec
+++ b/json-glib.spec
@@ -25,7 +25,7 @@ for the JavaScript Object Notation (JSON) format.
 %package devel
 Summary:	Development files for %{name}
 Group:		Development/Libraries
-Requires:	%{name} = %{version}-%{release}
+Requires:	%{name}%{_isa} = %{version}-%{release}
 
 %description devel
 The %{name}-devel package contains libraries and header files for
@@ -79,6 +79,7 @@ cp -a doc/reference/html/* $RPM_BUILD_ROOT%{_datadir}/gtk-doc/html/%{name}/
 * Fri May 30 2014 Kalev Lember <kalevlember@gmail.com> - 1.0.2-1
 - Update to 1.0.2
 - Avoid duplicating -devel deps that rpmbuild autogenerates
+- Tighten -devel deps with %%_isa
 
 * Tue Mar 25 2014 Kalev Lember <kalevlember@gmail.com> - 1.0.0-1
 - Update to 1.0.0