diff --git a/forms/configure_calls.rb b/forms/configure_calls.rb
index 3c0eeab48406e8cd5c1e564ae1a412da7bf33fcd..3bf4608d930ebf4a1a9b1c2eb788be53dc4e6371 100644
--- a/forms/configure_calls.rb
+++ b/forms/configure_calls.rb
@@ -14,8 +14,9 @@ if @customer.fwd.voicemail_enabled?
 		type: "text-single",
 		datatype: "xs:integer",
 		label: "Seconds to ring before voicemail",
-		description: "One ring is ~5 seconds. -1 means ring forever.",
-		value: @customer.fwd.timeout.to_i.to_s
+		description: "One ring is ~5 seconds",
+		value: @customer.fwd.timeout.to_i.to_s,
+		range: (0..300)
 	)
 
 	field(