diff --git a/forms/top_up.rb b/forms/top_up.rb
index 5864326ebd50f44446e81852f62884763e913a25..264a3d116a2ebe8ebf8666ecad5c2ab78e3b2269 100644
--- a/forms/top_up.rb
+++ b/forms/top_up.rb
@@ -1,7 +1,7 @@
 form!
 title "Buy Account Credit"
 
-if @max_top_up_amount & @max_top_up_amount.positive?
+if @max_top_up_amount&.positive?
 	instructions "Max amount: $#{@max_top_up_amount}"
 end