diff --git a/antlr.spec b/antlr.spec
index 553c7a3..bbaf572 100644
--- a/antlr.spec
+++ b/antlr.spec
@@ -16,6 +16,7 @@
 #
 
 
+%{!?make_build:%global make_build make %{?_smp_mflags}}
 %bcond_without python2
 Name:           antlr
 Version:        2.7.7