diff --git a/rear.spec b/rear.spec
index fe8a1de..473abd1 100644
--- a/rear.spec
+++ b/rear.spec
@@ -63,7 +63,10 @@ Requires: gawk
 Requires: attr
 Requires: bc
 Requires: iproute
-Requires: xorriso
+# No ISO image support on s390x (may change when we add support for LPARs)
+%ifnarch s390x
+Requires:   xorriso
+%endif
 Requires: file
 Requires: dhcp-client
 %if 0%{?rhel}