diff --git a/ghc-rpm-macros.ghc b/ghc-rpm-macros.ghc
index 84feeb9..eab61e5 100644
--- a/ghc-rpm-macros.ghc
+++ b/ghc-rpm-macros.ghc
@@ -115,6 +115,7 @@ Summary:        %{?common_summary}%{!?common_summary:Haskell %{pkgname} library}
 Group:          System Environment/Libraries\
 %{?1:Version:        %{pkgver}}\
 %{-l:License:        %{-l*}}\
+%{?ghc_pkg_obsoletes:Obsoletes:      %(echo "%{ghc_pkg_obsoletes}" | sed -e "s/\\(ghc-[^, ]*\\)-devel/\\1/g")}\
 \
 %description -n %{basepkg}\
 %{?common_description}%{!?common_description:Haskell %{pkgname} library.}\
diff --git a/ghc-rpm-macros.spec b/ghc-rpm-macros.spec
index 4d54ff8..7ed0006 100644
--- a/ghc-rpm-macros.spec
+++ b/ghc-rpm-macros.spec
@@ -1,7 +1,7 @@
 %global debug_package %{nil}
 
 Name:		ghc-rpm-macros
-Version:	0.11.11
+Version:	0.11.12
 Release:	1%{?dist}
 Summary:	Macros for building packages for GHC
 
@@ -58,6 +58,9 @@ EOF
 
 
 %changelog
+* Thu Mar 10 2011 Jens Petersen <petersen@redhat.com> - 0.11.12-1
+- add ghc_pkg_obsoletes to binlib base lib package too
+
 * Wed Mar  9 2011 Jens Petersen <petersen@redhat.com> - 0.11.11-1
 - add docdir when subpackaging packages too