diff --git a/start.S b/start.S
index 4e4ae05..2bf26a8 100644
--- a/start.S
+++ b/start.S
@@ -19,9 +19,9 @@ __hard_reset__:
 
     bl bootload_v2
 
-
     readloop:
     ldr.n r0, [r7, #8]
+    wfi
     b.n readloop
 
 load_systick_timer: