diff --git a/mash-nodelta.patch b/mash-nodelta.patch
new file mode 100644
index 0000000..11bcd00
--- /dev/null
+++ b/mash-nodelta.patch
@@ -0,0 +1,11 @@
+diff -up mash-0.5.21/configs/rawhide.mash.foo mash-0.5.21/configs/rawhide.mash
+--- mash-0.5.21/configs/rawhide.mash.foo	2011-04-04 17:22:18.000000000 -0400
++++ mash-0.5.21/configs/rawhide.mash	2011-04-04 17:22:32.013000326 -0400
+@@ -14,6 +14,6 @@ keys = 069C8460, 97A1071F, E8E40FDE, 57B
+ repoviewurl = http://download.fedoraproject.org/pub/fedora/linux/development/rawhide/%(arch)s/os/
+ repoviewtitle = "Fedora Rawhide - %(arch)s"
+ arches = i386 x86_64
+-delta = True
++delta = False
+ # Change distro_tags as fedora-release version gets bumped
+ distro_tags = cpe:/o:fedoraproject:fedora:16 rawhide
diff --git a/mash.spec b/mash.spec
index ccc0afe..f2e375f 100644
--- a/mash.spec
+++ b/mash.spec
@@ -10,6 +10,7 @@ URL:            http://fedorahosted.org/releases/m/a/mash/
 Source0:        http://fedorahosted.org/releases/m/a/mash/%{name}-%{version}.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Patch0:		mash-keys.patch
+Patch1:		mash-nodelta.patch
 Requires:       yum, createrepo, koji
 Conflicts:	pungi < 1.0.0
 BuildRequires:  python-devel
@@ -23,6 +24,7 @@ any multlib RPMs that are necessary.
 %prep
 %setup -q
 %patch0 -p1
+%patch1 -p1
 
 %build
 %{__python} setup.py build
@@ -46,6 +48,9 @@ rm -rf $RPM_BUILD_ROOT
 /var/cache/mash
 
 %changelog
+* Mon Apr  4 2011 Bill Nottingham <notting@redhat.com> 0.5.21-3
+- disable deltas (releng #4610)
+
 * Thu Feb 17 2011 Bill Nottingham <notting@redhat.com> 0.5.21-2
 - fix keys