diff --git a/lib/kiss/kiss_serial.rb b/lib/kiss/kiss_serial.rb index 6224cd9d3b6f09d19c0d513b9ff314a7974cd59b..051abd22843e745c0d1db308bf336dddf770f000 100644 --- a/lib/kiss/kiss_serial.rb +++ b/lib/kiss/kiss_serial.rb @@ -71,7 +71,7 @@ module Kiss write_interface(MODE_END) end - if @serial == nil or @serial&.closed? + if @serial == nil or @serial.closed? raise 'Attempting to close before the class has been started.' else @serial.close