diff --git a/librtas.spec b/librtas.spec
index 8aeb60c..815fe54 100644
--- a/librtas.spec
+++ b/librtas.spec
@@ -42,7 +42,7 @@ developing programs using librtas.
 # these errors in our code.
 CFLAGS="%{optflags} -fPIC -DPIC -I."
 CFLAGS=`echo $CFLAGS | sed 's/-Werror=format-security//'`
-%{__make} $CFLAGS
+%{__make} CFLAGS="$CFLAGS" %{?_smp_mflags}
 
 %install
 mkdir -p %{buildroot}/%{_libdir}