diff --git a/b43-tools.spec b/b43-tools.spec
index 7ecc369..8a2d371 100644
--- a/b43-tools.spec
+++ b/b43-tools.spec
@@ -1,6 +1,6 @@
 Name:		b43-tools
 Version:	019
-Release:	6%{?dist}
+Release:	7%{?dist}
 Summary:	Tools for the Broadcom 43xx series WLAN chip
 # assembler — GPLv2
 # debug — GPLv3
@@ -41,9 +41,9 @@ install -p -m 0644 debug/install.py debug/setup.py
 
 
 %build
-CFLAGS="%{optflags}" make %{?_smp_mflags} -C assembler
-CFLAGS="%{optflags}" make %{?_smp_mflags} -C disassembler
-CFLAGS="%{optflags}" make %{?_smp_mflags} -C ssb_sprom
+CFLAGS="%{optflags}" %{make_build} -C assembler
+CFLAGS="%{optflags}" %{make_build} -C disassembler
+CFLAGS="%{optflags}" %{make_build} -C ssb_sprom
 cd debug
 %py3_build
 
@@ -76,6 +76,10 @@ cd debug
 
 
 %changelog
+* Tue May 05 2020 Tom Stellard <tstellar@redhat.com> - 019-7
+- Use make_build macro
+- https://docs.fedoraproject.org/en-US/packaging-guidelines/#_parallel_make
+
 * Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 019-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild