diff --git a/java-1_8_0-openjdk.spec b/java-1_8_0-openjdk.spec
index 41adb07..4ea1435 100644
--- a/java-1_8_0-openjdk.spec
+++ b/java-1_8_0-openjdk.spec
@@ -16,6 +16,7 @@
 #
 
 
+%{!?make_build:%global make_build make %{?_smp_mflags}}
 %{!?aarch64:%global aarch64 aarch64 arm64 armv8}
 %global jit_arches %{ix86} x86_64 ppc64 ppc64le %{aarch64} %{arm}
 %global icedtea_version 3.20.0