diff --git a/sord.spec b/sord.spec
index f3cca10..17c9f9c 100644
--- a/sord.spec
+++ b/sord.spec
@@ -3,7 +3,7 @@
 
 Name:       sord
 Version:    0.16.4
-Release:    4%{?dist}
+Release:    5%{?dist}
 Summary:    A lightweight Resource Description Framework (RDF) C library
 
 License:    ISC
@@ -44,6 +44,12 @@ sed -i -e "s|bld.add_post_fun(autowaf.run_ldconfig)||" \
 
 %build
 %set_build_flags
+# Work around a possible GCC 10.1 bug
+# GCC 10.1 crashes on these arches in for loop with ZixBTreeIter
+%ifarch %{power64} %{arm} aarch64 s390 s390x
+CFLAGS+=" -O1"
+CXXFLAGS+=" -O1"
+%endif
 export LINKFLAGS="%{__global_ldflags}"
 python3 waf configure \
     --prefix=%{_prefix} \
@@ -78,6 +84,9 @@ install -pm 644 AUTHORS NEWS README.md COPYING %{buildroot}%{_pkgdocdir}
 %{_mandir}/man3/%{name}*.3*
 
 %changelog
+* Fri May 29 2020 Guido Aulisi <guido.aulisi@gmail.com> - 0.16.4-5
+- Rebuilt for possible GCC 10.1 bug on power64, arm and s390
+
 * Wed May 27 2020 Guido Aulisi <guido.aulisi@gmail.com> - 0.16.4-4
 - Rebuilt with GCC 10.1