diff --git a/build/tracking.js b/build/tracking.js
index f73bf31..9803e2b 100644
--- a/build/tracking.js
+++ b/build/tracking.js
@@ -1412,7 +1412,7 @@
   tracking.Fast.circles_ = {};
 
   /**
-   * Finds corners coordinates on the graysacaled image.
+   * Finds corners coordinates on the grayscale image.
    * @param {array} The grayscale pixels in a linear [p1,p2,...] array.
    * @param {number} width The image width.
    * @param {number} height The image height.
@@ -3108,4 +3108,4 @@
     this.leafnodes = data.id_leafnodes;
   }
 
-}());
\ No newline at end of file
+}());
diff --git a/src/features/Fast.js b/src/features/Fast.js
index 797edd8..c288c82 100644
--- a/src/features/Fast.js
+++ b/src/features/Fast.js
@@ -41,7 +41,7 @@
   tracking.Fast.circles_ = {};
 
   /**
-   * Finds corners coordinates on the graysacaled image.
+   * Finds corners coordinates on the grayscale image.
    * @param {array} The grayscale pixels in a linear [p1,p2,...] array.
    * @param {number} width The image width.
    * @param {number} height The image height.