diff --git a/frontend/ui/screen.lua b/frontend/ui/screen.lua
index b3cf969d3..96b9af09f 100644
--- a/frontend/ui/screen.lua
+++ b/frontend/ui/screen.lua
@@ -131,7 +131,7 @@ function Screen:getDPI()
 end
 
 function Screen:scaleByDPI(px)
-	return (px * self:getDPI()/167)
+	return math.floor(px * self:getDPI()/167)
 end
 
 -- make a shortcut to Screen:scaleByDPI