diff --git a/util/Util.js b/util/Util.js
index cf6d8d13..bff2c77f 100644
--- a/util/Util.js
+++ b/util/Util.js
@@ -111,7 +111,7 @@ class Util {
 				const xs = Math.round(amplitude * Math.sin(2 * Math.PI * 3 * (j / height)));
 				const ys = Math.round(amplitude * Math.cos(2 * Math.PI * 3 * (i / width)));
 				const dest = (j * stride) + (i * strideLevel);
-				const src = (j + ys) * (stride + (i + xs)) * strideLevel;
+				const src = ((j + ys) * stride) + ((i + xs) * strideLevel);
 				data.data[dest] = temp.data[src];
 				data.data[dest + 1] = temp.data[src + 1];
 				data.data[dest + 2] = temp.data[src + 2];