diff --git a/libguestfs.spec b/libguestfs.spec
index 6d63a1d..0c3a38a 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -53,7 +53,10 @@
 %define guestfs_docdir %{_defaultdocdir}/%{name}
 #
 Name:           libguestfs
+%if "%{_ignore_exclusive_arch}" != ""
+%else
 ExclusiveArch:  %ix86 x86_64
+%endif
 BuildRequires:  libacl-devel
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -386,6 +389,7 @@ virtual machines.
 
 
 %prep
+: _ignore_exclusive_arch '%{_ignore_exclusive_arch}'
 %setup -q -a 789653
 %patch795503 -p1
 %patch1 -p1