diff --git a/mock/c7-devtoolset-6.ppc.cfg b/mock/c7-devtoolset-6.ppc.cfg
index e94b51f..4aabce7 100644
--- a/mock/c7-devtoolset-6.ppc.cfg
+++ b/mock/c7-devtoolset-6.ppc.cfg
@@ -28,6 +28,7 @@ gpgcheck=0
 assumeyes=1
 syslog_ident=mock
 syslog_device=
+exclude=*.ppc64
 
 # repos
 [c7-extras.ppc]