diff --git a/src/lib/const_delay.py b/src/lib/const_delay.py
index 0e68e80f45..087ed7f0cf 100644
--- a/src/lib/const_delay.py
+++ b/src/lib/const_delay.py
@@ -1,4 +1,3 @@
-from trezor.loop import Sleep
 import utime
 
 class ConstDelay:
@@ -10,4 +9,4 @@ class ConstDelay:
         # FIXME - use loop.call_at instead of call_later to avoid multiple time handling
         delay = 2 * self.delay - (utime.ticks_us() - self.last_run)
         self.last_run = utime.ticks_us()
-        return Sleep(delay)
+        return delay