diff --git a/libsmi.spec b/libsmi.spec
index 4583b82..2792173 100644
--- a/libsmi.spec
+++ b/libsmi.spec
@@ -10,9 +10,12 @@
 # <https://bugzilla.redhat.com/show_bug.cgi?id=2256912>
 %global build_type_safety_c 1
 
+# build will break with too much parallel processes, limit to 4
+%global ncpus_max 4
+
 Name:		libsmi
 Version:	0.4.8
-Release:	39%{?dist}
+Release:	40%{?dist}
 Summary:	A library to access SMI MIB information
 License:	TCL AND BSD-3-Clause
 URL:		http://www.ibr.cs.tu-bs.de/projects/libsmi/index.html
@@ -128,6 +131,9 @@ make check ||:
 
 
 %changelog
+* Tue Jun 04 2024 Michal Hlavinka <mhlavink@redhat.com> - 0.4.8-40
+- reduce build parallelism, too much breaks the build
+
 * Wed May 15 2024 Michal Hlavinka <mhlavink@redhat.com> - 0.4.8-39
 - fix license field (#RHEL-36338)