diff --git a/button.lua b/button.lua
index 42c44e3..5042ae6 100644
--- a/button.lua
+++ b/button.lua
@@ -14,7 +14,9 @@ end
 function propagate_to_button_handlers(x, y, mouse_button)
   for _,ev in ipairs(Button_handlers) do
     if x>ev.x and x<ev.x+ev.w and y>ev.y and y<ev.y+ev.h then
-      if ev.onpress1 and mouse_button == 1 then ev.onpress1() end
+      if ev.onpress1 and mouse_button == 1 then
+        ev.onpress1()
+      end
     end
   end
 end