diff --git a/clisp.spec b/clisp.spec
index a574085..9c59924 100644
--- a/clisp.spec
+++ b/clisp.spec
@@ -171,7 +171,7 @@ else
     CC="gcc"
 fi
 %ifarch s390x
-##RPM_OPT_FLAGS="$(echo %{optflags}|sed -r 's/-fstack-protector-strong ?//g;s/-f(stack-clash-protection)/-fno-\1/') -fno-stack-limit"
+%{expand:%%global optflags %(echo "%{optflags}"|sed -r -e s/-fstack-protector-strong// -e s/-fstack-clash-protection//)}
 %endif
 CC="${CC} -g %{optflags} -fno-strict-aliasing -fPIC -pipe"
 case "$(uname -m)" in