diff --git a/blam.spec b/blam.spec
index 908db98..da9527c 100644
--- a/blam.spec
+++ b/blam.spec
@@ -17,6 +17,8 @@ Patch1:		%{name}-fedora-people-in-default-collection.patch
 Patch2:		%{name}-fix-THEME_DIR-path.patch
 
 BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+## Various Mono dependencies are not available for ppc64; see bug 241850.
+ExcludeArch:	ppc64
 
 BuildRequires:	mono-devel
 BuildRequires:	gnome-sharp-devel