diff --git a/nspr.spec b/nspr.spec
index a596dd9..327d91b 100644
--- a/nspr.spec
+++ b/nspr.spec
@@ -58,10 +58,7 @@ export LDFLAGS
                  --prefix=%{_prefix} \
                  --libdir=%{_libdir} \
                  --includedir=%{_includedir}/nspr4 \
-%ifarch noarch
-# __isa_bits doedn't make sense for noarch
-# which is the target when build the srpm
-%else
+%ifnarch noarch
 %if 0%{__isa_bits} == 64
                  --enable-64bit \
 %endif