diff --git a/lights.js b/lights.js
index 5336025..fe19ecc 100644
--- a/lights.js
+++ b/lights.js
@@ -10,7 +10,7 @@ var next_pattern = new Uint32Array(cfg.leds);
 var pattern = {}
 
 function rgb_to_int(r, g, b) {
-  return ((r << 8) + g) << 8 + b;
+  return (((r << 8) + g) << 8) + b;
 }
 function int_to_rgb(int) {
   var r = int >> 16 & 0xFF;