diff --git a/js/apple2io.js b/js/apple2io.js
index dde95f4..2ffdecf 100644
--- a/js/apple2io.js
+++ b/js/apple2io.js
@@ -495,7 +495,7 @@ export default function Apple2IO(cpu, callbacks)
 
         sampleRate: function sampleRate(rate, sample_size) {
             _rate = rate;
-            _sample_size = sample_size
+            _sample_size = sample_size;
             _sample = new Array(_sample_size);
             _sampleIdx = 0;
             _calcSampleRate();
diff --git a/js/ui/audio.js b/js/ui/audio.js
index 0117eeb..8f4afd5 100644
--- a/js/ui/audio.js
+++ b/js/ui/audio.js
@@ -15,8 +15,8 @@ import { debug } from '../util';
  * Audio Handling
  */
 
-var SAMPLE_SIZE = 1024
-var SAMPLE_RATE = 44000
+var SAMPLE_SIZE = 1024;
+var SAMPLE_RATE = 44000;
 
 export default function Audio(io) {
     var sound = true;