diff --git a/csmash.changes b/csmash.changes
index bd020a4..cf59dcb 100644
--- a/csmash.changes
+++ b/csmash.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jun  4 12:00:26 UTC 2018 - meissner@suse.com
+
+- build with RPM_OPT_FLAGS
+
 -------------------------------------------------------------------
 Fri Feb  9 12:52:58 UTC 2018 - crrodriguez@opensuse.org
 
diff --git a/csmash.spec b/csmash.spec
index b705a34..2352102 100644
--- a/csmash.spec
+++ b/csmash.spec
@@ -65,7 +65,7 @@ mv README.en README
 %configure \
   --x-includes=%{_includedir} \
   --x-libraries=%{_libdir}
-make %{?_smp_mflags}
+make %{?_smp_mflags} AM_CFLAGS="%optflags" AM_CPPFLAGS="%optflags"
 
 %install
 make DESTDIR=%{buildroot} install