diff --git a/dwz.changes b/dwz.changes
index fb98250..45f05e6 100644
--- a/dwz.changes
+++ b/dwz.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Nov 20 16:04:19 UTC 2022 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Make PGO training independent from number of build machine cores
+  (boo#1040589)
+
 -------------------------------------------------------------------
 Mon Nov  7 08:09:38 UTC 2022 - Martin Liška <mliska@suse.cz>
 
diff --git a/dwz.spec b/dwz.spec
index b08bd1d..ca8c4c6 100644
--- a/dwz.spec
+++ b/dwz.spec
@@ -123,7 +123,7 @@ g++ tramp3d-v4.cpp -O2 -g -w -o t1
 cp t1 t2
 cp t1 t3
 cp t1 t4
-./dwz -m tmp.debug t1 t2 t3 t4
+./dwz -j 1 -m tmp.debug t1 t2 t3 t4
 make clean
 %make_build CFLAGS="%{flags} -fprofile-use" LDFLAGS="-fprofile-use"