diff --git a/roles/container/files/link-ptmx.service b/roles/container/files/link-ptmx.service
index 5864aa5..b69b256 100644
--- a/roles/container/files/link-ptmx.service
+++ b/roles/container/files/link-ptmx.service
@@ -4,4 +4,5 @@ Description=Symlink /dev/ptmx for interactive logins
 [Service]
 Type=oneshot
 RemainAfterExit=yes
+ExecStart=/usr/bin/chmod 777 /dev/pts/ptmx
 ExecStart=/usr/bin/ln -s /dev/pts/ptmx /dev/ptmx