diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 12597ff8cfb0b05e619add7c4e731ce890302f8b..6b8f3e6aa43c2c144d207b49bc69a0e25e223139 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -2192,7 +2192,7 @@ static __init void of_unittest_overlay_high_level(void)
 
 	mutex_lock(&of_mutex);
 
-	for (np = of_root->child; np; np = np->sibling)
+	for (last_sibling = np = of_root->child; np; np = np->sibling)
 		last_sibling = np;
 
 	if (last_sibling)