diff --git a/baselibs.conf b/baselibs.conf
new file mode 100644
index 0000000..8009479
--- /dev/null
+++ b/baselibs.conf
@@ -0,0 +1 @@
+libgegl-0_4-0
diff --git a/gegl.changes b/gegl.changes
index 2704205..dc3afb3 100644
--- a/gegl.changes
+++ b/gegl.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue May  8 18:42:14 UTC 2018 - bjorn.lie@gmail.com
+
+- Add baselibs.conf, build 32-bit support.
+
 -------------------------------------------------------------------
 Fri Apr 27 18:11:11 UTC 2018 - bjorn.lie@gmail.com
 
diff --git a/gegl.spec b/gegl.spec
index d4d90ed..ef2ed59 100644
--- a/gegl.spec
+++ b/gegl.spec
@@ -24,6 +24,7 @@ License:        GPL-3.0-or-later AND LGPL-3.0-or-later
 Group:          Productivity/Graphics/Other
 URL:            http://gegl.org/
 Source0:        https://download.gimp.org/pub/gegl/0.4/%{name}-%{version}.tar.bz2
+Source99:       baselibs.conf
 BuildRequires:  ImageMagick
 BuildRequires:  SDL-devel >= 1.2.0
 BuildRequires:  enscript