diff --git a/python3-simplejson.spec b/python3-simplejson.spec
index 4c71955..7e74bd1 100644
--- a/python3-simplejson.spec
+++ b/python3-simplejson.spec
@@ -42,7 +42,7 @@ serious speed boost.
 %setup -q -n %{modname}-%{version}
 
 %build
-python3 setup.py build
+CFLAGS="%{optflags} -fno-strict-aliasing" python3 setup.py build
 
 %install
 python3 setup.py install --prefix=%{_prefix} --root=%{buildroot}