diff --git a/editorconfig.spec b/editorconfig.spec
index cd30a89..e053fec 100644
--- a/editorconfig.spec
+++ b/editorconfig.spec
@@ -1,3 +1,6 @@
+# build process has race conditions, force single thread
+%global _smp_mflags -j1
+
 %global srcname editorconfig-core-c
 
 %global common_description %{expand:
@@ -10,7 +13,7 @@ editors.}
 Name:           editorconfig
 Summary:        Parser for EditorConfig files written in C
 Version:        0.12.4
-Release:        2%{?dist}
+Release:        3%{?dist}
 License:        BSD
 
 URL:            https://github.com/editorconfig/editorconfig-core-c
@@ -87,6 +90,9 @@ rm %{buildroot}/%{_libdir}/libeditorconfig_static.a
 
 
 %changelog
+* Thu Feb 04 2021 Fabio Valentini <decathorpe@gmail.com> - 0.12.4-3
+- Force single-threaded build to work around race conditions.
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.12.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild