diff --git a/iw.spec b/iw.spec
index 0bd03a1..311c820 100644
--- a/iw.spec
+++ b/iw.spec
@@ -24,7 +24,8 @@ only because most new wireless devices being sold are now SoftMAC.
 
 
 %build
-make %{?_smp_mflags} CFLAGS="$RPM_OPT_FLAGS"
+export CFLAGS="$RPM_OPT_FLAGS"
+make %{?_smp_mflags
 
 
 %install