diff --git a/ghc-rpm-macros.spec b/ghc-rpm-macros.spec
index f0162fc..efaba1e 100644
--- a/ghc-rpm-macros.spec
+++ b/ghc-rpm-macros.spec
@@ -6,7 +6,7 @@
 #%%global without_hscolour 1
 
 Name:           ghc-rpm-macros
-Version:        1.3.3
+Version:        1.3.4
 Release:        1%{?dist}
 Summary:        RPM macros for building packages for GHC
 
@@ -93,6 +93,9 @@ EOF
 
 
 %changelog
+* Thu Aug 28 2014 Jens Petersen <petersen@redhat.com> - 1.3.4-1
+- drop -O2 for ghc-7.8: it uses too much build mem
+
 * Fri Aug 22 2014 Jens Petersen <petersen@redhat.com> - 1.3.3-1
 - temporarily revert to ghc-7.6 config for shared libs
   until we move to ghc-7.8
diff --git a/macros.ghc b/macros.ghc
index 2420624..d45ce18 100644
--- a/macros.ghc
+++ b/macros.ghc
@@ -21,7 +21,7 @@ fi
 # configure
 %cabal_configure\
 %ghc_check_bootstrap\
-%cabal configure --prefix=%{_prefix} --libdir=%{_libdir} --docdir=%{?_pkgdocdir}%{!?_pkgdocdir:%{_docdir}/%{name}-%{version}} --libsubdir='$compiler/$pkgid' --datasubdir='$pkgid' --ghc %{!?ghc_without_dynamic:--enable-executable-dynamic} --ghc-option=-O2 %{?with_tests:--enable-tests} %{?cabal_configure_options} $cabal_configure_extra_options
+%cabal configure --prefix=%{_prefix} --libdir=%{_libdir} --docdir=%{?_pkgdocdir}%{!?_pkgdocdir:%{_docdir}/%{name}-%{version}} --libsubdir='$compiler/$pkgid' --datasubdir='$pkgid' --ghc %{!?ghc_without_dynamic:--enable-executable-dynamic} %{?with_tests:--enable-tests} %{?cabal_configure_options} $cabal_configure_extra_options
 
 # install
 %cabal_install %cabal copy --destdir=%{buildroot} -v