diff --git a/gambit-c.spec b/gambit-c.spec
index 69a86f7..4f9d298 100644
--- a/gambit-c.spec
+++ b/gambit-c.spec
@@ -8,7 +8,7 @@
 
 Name:           gambit-c
 Version:        4.6.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Scheme programming system
 
 Group:          Development/Languages
@@ -49,6 +49,8 @@ BuildArch:      noarch
 Requires:       %{name} = %{version}-%{release}
 Requires(post):  info
 Requires(preun): info
+# switch to noarch
+Obsoletes:	gambit-c-doc < %{version}-%{release}
 %if %{?_with_termite:0}%{!?_with_termite:1}
 Provides:       gambit-c-termite-doc = %{version}-%{release}
 Obsoletes:      gambit-c-termite-doc < %{version}-%{release}
@@ -256,6 +258,9 @@ fi
 
 
 %changelog
+* Mon Jul 12 2010 Michel Salim <salimma@fedoraproject.org> - 4.6.0-2
+- noarch -doc subpackage properly obsoletes older, arched variant
+
 * Mon Jul 12 2010 Michel Salim <salimma@fedoraproject.org> - 4.6.0-1
 - Update to 4.6.0
 - Bundle license text with independent Emacs subpackage