diff --git a/sip.spec b/sip.spec
index 3a36802..d6b34fc 100644
--- a/sip.spec
+++ b/sip.spec
@@ -14,6 +14,9 @@
 # trim changelog included in binary rpms
 %global _changelog_trimtime %(date +%s -d "1 year ago")
 
+# see also https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/JQQ66XJSIT2FGTK2YQY7AXMEH5IXMPUX/
+%undefine _strict_symbol_defs_build
+
 Summary: SIP - Python/C++ Bindings Generator
 Name: sip
 Version: 4.19.7