diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 82f7327c59ea..ba65e36e183c 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -391,8 +391,6 @@ void *__unflatten_device_tree(const void *blob,
 	if (!mem)
 		return NULL;
 
-	memset(mem, 0, size);
-
 	*(__be32 *)(mem + size) = cpu_to_be32(0xdeadbeef);
 
 	pr_debug("  unflattening %p...\n", mem);