diff --git a/libguestfs.spec b/libguestfs.spec
index fd8cf73..a5cf4b9 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -67,7 +67,7 @@
 %define guestfs_docdir %{_defaultdocdir}/%{name}
 #
 Name:           libguestfs
-%if "%{_ignore_exclusive_arch}" != ""
+%if "%{?_ignore_exclusive_arch}" != ""
 %else
 ExclusiveArch:  %ix86 x86_64
 %endif
@@ -403,7 +403,8 @@ virtual machines.
 
 
 %prep
-: _ignore_exclusive_arch '%{_ignore_exclusive_arch}'
+: _ignore_exclusive_arch '%{?_ignore_exclusive_arch}'
+exit 1
 %setup -q -a 789653
 %patch795503 -p1
 %patch1 -p1