diff --git a/gdk-pixbuf2.spec b/gdk-pixbuf2.spec
index 9188b0a..f3187eb 100644
--- a/gdk-pixbuf2.spec
+++ b/gdk-pixbuf2.spec
@@ -25,7 +25,7 @@ BuildRequires:  shared-mime-info
 BuildRequires: autoconf automake libtool gtk-doc
 BuildRequires: gettext-autopoint
 
-Requires: glib2 >= %{glib2_version}
+Requires: glib2%{?_isa} >= %{glib2_version}
 
 # We also need MIME information at runtime
 Requires: shared-mime-info
@@ -41,8 +41,8 @@ clutter.
 %package devel
 Summary: Development files for gdk-pixbuf
 Group: Development/Libraries
-Requires: %{name} = %{version}-%{release}
-Requires: glib2-devel >= %{glib2_version}
+Requires: %{name}%{?_isa} = %{version}-%{release}
+Requires: glib2-devel%{?_isa} >= %{glib2_version}
 
 # gdk-pixbuf was included in gtk2 until 2.21.2
 Conflicts: gtk2-devel <= 2.21.2
@@ -134,6 +134,7 @@ fi
 %changelog
 * Fri Aug 09 2013 Kalev Lember <kalevlember@gmail.com> - 2.29.3-1
 - Update to 2.29.3
+- Tighten deps with %%_isa
 
 * Sat Aug 03 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.29.2-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild