diff --git a/openbios.spec b/openbios.spec
index 38b88bf..56447fc 100644
--- a/openbios.spec
+++ b/openbios.spec
@@ -1,6 +1,10 @@
 %global hash 7f28286
 %global date 20200725
 
+# https://fedoraproject.org/wiki/Changes/SetBuildFlagsBuildCheck
+# breaks cross-building
+%undefine _auto_set_build_flags
+
 # Disable unhelpful RPM test.
 %global _binaries_in_noarch_packages_terminate_build 0