diff --git a/gdk-pixbuf2.spec b/gdk-pixbuf2.spec
index b7c0d28..53e301b 100644
--- a/gdk-pixbuf2.spec
+++ b/gdk-pixbuf2.spec
@@ -11,13 +11,13 @@ URL:            http://www.gt.org
 #VCS:           git:git://git.gnome.org/gdk-pixbuf
 Source0:        http://download.gnome.org/sources/gdk-pixbuf/2.31/gdk-pixbuf-%{version}.tar.xz
 
-BuildRequires:  glib2-devel >= %{glib2_version}
+BuildRequires:  pkgconfig(gio-2.0) >= %{glib2_version}
 BuildRequires:  libpng-devel
 BuildRequires:  libjpeg-devel
 BuildRequires:  libtiff-devel
 BuildRequires:  jasper-devel
-BuildRequires:  libX11-devel
-BuildRequires:  gobject-introspection-devel >= 0.9.3
+BuildRequires:  pkgconfig(x11)
+BuildRequires:  pkgconfig(gobject-introspection-1.0) >= 0.9.3
 # gdk-pixbuf does a configure time check which uses the GIO mime
 # layer; we need to actually have the mime type database.
 BuildRequires:  shared-mime-info
@@ -180,6 +180,7 @@ fi
 %changelog
 * Mon Jul 20 2015 David King <amigadave@amigadave.com> - 2.31.5-1
 - Update to 2.31.5
+- Use pkgconfig for some BuildRequires
 
 * Wed Jun 17 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.31.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild