diff --git a/src/trezor/ui/loader.py b/src/trezor/ui/loader.py
index eb1289f6e..1dfcea762 100644
--- a/src/trezor/ui/loader.py
+++ b/src/trezor/ui/loader.py
@@ -17,12 +17,11 @@ DEFAULT_LOADER_ACTIVE = {
     'icon-fg-color': None,
 }
 
-_LOADER_MSEC = const(1000)
-
 
 class Loader(ui.Widget):
 
-    def __init__(self, normal_style=None, active_style=None):
+    def __init__(self, target_ms=1000, normal_style=None, active_style=None):
+        self.target_ms = target_ms
         self.start_ticks_ms = None
         self.normal_style = normal_style or DEFAULT_LOADER
         self.active_style = active_style or DEFAULT_LOADER_ACTIVE
@@ -35,14 +34,14 @@ class Loader(ui.Widget):
         ui.display.bar(0, 32, 240, 240 - 80, ui.BLACK)
         ticks_diff = utime.ticks_ms() - self.start_ticks_ms
         self.start_ticks_ms = None
-        return ticks_diff >= _LOADER_MSEC
+        return ticks_diff >= self.target_ms
 
     def is_active(self):
         return self.start_ticks_ms is not None
 
     def render(self):
-        progress = min(utime.ticks_ms() - self.start_ticks_ms, _LOADER_MSEC)
-        if progress == _LOADER_MSEC:
+        progress = min(utime.ticks_ms() - self.start_ticks_ms, self.target_ms)
+        if progress == self.target_ms:
             style = self.active_style
         else:
             style = self.normal_style