diff --git a/src/math/trigonometry.js b/src/math/trigonometry.js
index e38f1d4f88..dfbbfc1cb0 100644
--- a/src/math/trigonometry.js
+++ b/src/math/trigonometry.js
@@ -129,7 +129,7 @@ p5.prototype.atan = function(ratio) {
  * to the position of the cursor.
  *
  * Note: The y-coordinate of the point is the first parameter, and the
- * x-coordinate is the second parameter, due the the structure of calculating
+ * x-coordinate is the second parameter, due to the structure of calculating
  * the tangent.
  *
  * @method atan2