diff --git a/clisp.spec b/clisp.spec
index 58845c7..c809fb7 100644
--- a/clisp.spec
+++ b/clisp.spec
@@ -151,7 +151,7 @@ else
     CC="gcc"
 fi
 %ifarch s390x
-RPM_OPT_FLAGS="$(echo %{optflags}|sed -r 's/-f(stack-[a-z-]+)/-fno\1/g') -fno-stack-limit"
+RPM_OPT_FLAGS="$(echo %{optflags}|sed -r 's/-f(stack-[a-z-]+)/-fno-\1/g') -fno-stack-limit"
 %endif
 CC="${CC} -g ${RPM_OPT_FLAGS} -falign-functions=4 -fno-strict-aliasing -fPIC -pipe"
 case "$(uname -m)" in