diff --git a/xmlsec1.spec b/xmlsec1.spec
index da2a08f..9035e61 100644
--- a/xmlsec1.spec
+++ b/xmlsec1.spec
@@ -147,7 +147,7 @@ Libraries, includes, etc. for developing XML Security applications with NSS.
     --disable-silent-rules \
     --enable-werror \
     --disable-md5
-%make_build
+make %{?_smp_mflags}
 
 %install
 %make_install