diff --git a/sgx_jmp.rb b/sgx_jmp.rb
index 4e3837270fc96ea8cedbcdf96e4762e264fe434e..56ffe070f1d8b4f122d8fd3180c1d9eb2b900890 100644
--- a/sgx_jmp.rb
+++ b/sgx_jmp.rb
@@ -455,7 +455,7 @@ Command.new(
 Command.new(
 	"alt top up",
 	"Buy Account Credit by Bitcoin, Mail, or Interac eTransfer",
-	list_for: ->(customer:, **) { !!customer.currency }
+	list_for: ->(customer:, **) { !!customer&.currency }
 ) {
 	Command.customer.then { |customer|
 		EMPromise.all([AltTopUpForm.for(customer), customer])