diff --git a/forms/alt_top_up/simpleswap.rb b/forms/alt_top_up/simpleswap.rb
index 9cd0d1549b5afbab838b9c1d940a58b523082bd4..51450f084483206886c0560304f1574f1004949c 100644
--- a/forms/alt_top_up/simpleswap.rb
+++ b/forms/alt_top_up/simpleswap.rb
@@ -5,7 +5,7 @@ instructions "Your single-use address has been created"
 DESCRIPTION =
 	"You can make a payment worth $10 or more to this address and " \
 	"it will be credited to your account at the current exchange rate " \
-	"once fully confirmed.".freeze
+	"(minus any exchange fees, often over $1) once fully confirmed.".freeze
 
 field(
 	var: "addresses",