diff --git a/files/files/usr/lib/systemd/system/growpartfs.service b/files/files/usr/lib/systemd/system/growpartfs.service
index ed3a208..ac6d199 100644
--- a/files/files/usr/lib/systemd/system/growpartfs.service
+++ b/files/files/usr/lib/systemd/system/growpartfs.service
@@ -3,7 +3,7 @@ Description=Grows the filesystem and partition at %I
 
 [Service]
 Type=oneshot
-ExecStart=/usr/bin/growpartfs /dev/mmcblk0 2
+ExecStart=/usr/bin/growpartfs /dev/mmcblk0p2
 
 [Install]
 WantedBy=multi-user.target