diff --git a/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-svc/files/yosemite4-early-sys-init b/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-svc/files/yosemite4-early-sys-init
index cd33fcb..d1b4475 100644
--- a/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-svc/files/yosemite4-early-sys-init
+++ b/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-svc/files/yosemite4-early-sys-init
@@ -47,7 +47,9 @@
 if [ -z "$is_nuvoton_board" ]
 then
     # short-term set gpio v0~v3 to input pin for slot5~8 reset button
-    mknod -m 660 /dev/mem c 1 1
+    if [ ! -c "/dev/mem" ]; then
+        mknod -m 660 /dev/mem c 1 1
+    fi
     chown root:kmem /dev/mem
     devmem 0x1e78008c 32 0x19000000
 fi