diff --git a/src/ui/powerscreen.c b/src/ui/powerscreen.c
index ee5b7cf..268281a 100644
--- a/src/ui/powerscreen.c
+++ b/src/ui/powerscreen.c
@@ -45,8 +45,11 @@ static bool power_screen_dispatch(PowerScreen *screen,
             return true;
         }
     }
-    screen->choice = abs((screen->choice + state->up_down - state->down_down) %
-                         POWER_SCREEN_NCHOICE);
+    screen->choice = (screen->choice + state->up_down - state->down_down) %
+                     POWER_SCREEN_NCHOICE;
+    if (screen->choice < 0) {
+        screen->choice = POWER_SCREEN_NCHOICE - screen->choice;
+    }
     if (state->force_draw || state->up_down || state->down_down) {
         lcd_clear(state->lcd);
         lcd_move_to(state->lcd, 0, 0);