diff --git a/zeromq.spec b/zeromq.spec
index 2d41825..158f4c7 100644
--- a/zeromq.spec
+++ b/zeromq.spec
@@ -67,7 +67,9 @@ autoreconf -fi
             --with-libgssapi_krb5 \
 %endif
             --with-libsodium \
+%ifnarch s390x
             --enable-drafts \
+%endif
 %if %{with unwind}
             --enable-libunwind \
 %endif