diff --git a/emori.rb b/emori.rb
index a1e2146..9271e9d 100755
--- a/emori.rb
+++ b/emori.rb
@@ -14,7 +14,7 @@ SerialPort.open('/dev/ttyUSB0', 9600, 8, 1, SerialPort::NONE) do |s|
   
   if command == 'on' or command == 'off'
     puts 'all ' + command + '...'
-    ['a', 'c', 'c', 'd'].each do |port|
+    ['a', 'b', 'c', 'd'].each do |port|
       s.puts(command + ' ' + port)
     end
     s.puts('led ' + command)