diff --git a/gdm.spec b/gdm.spec
index 50928f0..834e850 100644
--- a/gdm.spec
+++ b/gdm.spec
@@ -88,7 +88,7 @@ BuildRequires: gnome-doc-utils
 BuildRequires: libdmx-devel
 BuildRequires: libselinux-devel >= %{libselinuxver}
 BuildRequires: audit-libs-devel >= %{libauditver}
-%ifnarch s390 s390x
+%ifnarch s390 s390x ppc64
 BuildRequires: xorg-x11-server-Xorg
 %endif
 Requires: libselinux >= %{libselinuxver}