diff --git a/firefox.spec b/firefox.spec
index fdd8d0c..9f3fcee 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -262,10 +262,10 @@ export MOZCONFIG=`pwd`/mozconfig
 cat << EOF > $MOZCONFIG
 mk_add_options BUILD_OFFICIAL=1
 mk_add_options MOZILLA_OFFICIAL=1
-mk_add_options MOZ_MAKE_FLAGS="%{smp_mflags}"
+mk_add_options MOZ_MAKE_FLAGS="%{_smp_mflags}"
 mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/../obj
 ac_add_options --disable-crashreporter
-# 
+# debug
 #ac_add_options --disable-debug
 #ac_add_options --disable-debug-symbols
 ac_add_options --disable-tests