diff --git a/js/jquery.knob.js b/js/jquery.knob.js
index 5294ffa..44220f2 100644
--- a/js/jquery.knob.js
+++ b/js/jquery.knob.js
@@ -472,7 +472,7 @@
         // Utils
         this.h2rgba = function (h, a) {
             var rgb;
-            h = h.substring(1,7)
+            h = h.substring(1,7);
             rgb = [
                 parseInt(h.substring(0,2), 16),
                 parseInt(h.substring(2,4), 16),