diff --git a/theremin/lib/theremin.rb b/theremin/lib/theremin.rb
index a61f68a..ac8d9b5 100755
--- a/theremin/lib/theremin.rb
+++ b/theremin/lib/theremin.rb
@@ -145,19 +145,19 @@ class Theremin
     end
 
 	# Delegate various methods directly to the underlying synth instance.
-    def_delegators :@synth, :gain, :glide, :load, :reverb, :chorus, :instrument
+	def_delegators :@synth, :gain, :glide, :load, :reverb, :chorus, :instrument
 
 	# The names of the GPIO pins.
 	attr_reader :pins
 
 	# The Fluidsynth instance.
-    attr_reader :synth
+	attr_reader :synth
 
 	# An IO to stream to espeak.
-    attr_reader :speech_io
+	attr_reader :speech_io
 
 	# Is this Theremin currently running?
-    attr_reader :running
+	attr_reader :running
 
 
 	### Start polling the GPIO for measurements.