diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a1de765b..fe1aeb44e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,6 +47,7 @@
 * The Phaser.Physics.Arcade constants are now exposed on the namespace. Fix #3387 (thanks @samme)
 * The Phaser.Scene constants are now exposed on the namespace. Fix #3387 (thanks @samme)
 * The Phaser.Tweens constants are now exposed on the namespace. Fix #3387 (thanks @samme)
+* The Array Matrix utils are now exposed and available via `Phaser.Utils.Array.Matrix`.
 
 
 
@@ -67,6 +68,8 @@
 * TileSprite scaling differed between WebGL and Canvas. Fix #3338 (thanks @TCatshoek)
 * Text.setFixedSize was incorrectly setting the `text` property instead of the `parent` property. Fix #3375 (thanks @rexrainbow)
 * RenderTexture.clear on canvas was using the last transform state, instead of clearing the whole texture.
+* Phaser.Utils.Array.Matrix.RotateLeft actually rotated to the right (thanks @Tomas2h)
+* Phaser.Utils.Array.Matrix.RotateRight actually rotated to the left (thanks @Tomas2h)
 
 ### Updates
 
diff --git a/src/utils/array/index.js b/src/utils/array/index.js
index ad9bba586..b51f46c3b 100644
--- a/src/utils/array/index.js
+++ b/src/utils/array/index.js
@@ -12,6 +12,7 @@ module.exports = {
 
     FindClosestInSorted: require('./FindClosestInSorted'),
     GetRandomElement: require('./GetRandomElement'),
+    Matrix: require('./Matrix'),
     NumberArray: require('./NumberArray'),
     NumberArrayStep: require('./NumberArrayStep'),
     QuickSelect: require('./QuickSelect'),
diff --git a/src/utils/array/matrix/RotateLeft.js b/src/utils/array/matrix/RotateLeft.js
index 92dac0edc..cf23066bd 100644
--- a/src/utils/array/matrix/RotateLeft.js
+++ b/src/utils/array/matrix/RotateLeft.js
@@ -18,7 +18,7 @@ var RotateMatrix = require('./RotateMatrix');
  */
 var RotateLeft = function (matrix)
 {
-    return RotateMatrix(matrix, -90);
+    return RotateMatrix(matrix, 90);
 };
 
 module.exports = RotateLeft;
diff --git a/src/utils/array/matrix/RotateMatrix.js b/src/utils/array/matrix/RotateMatrix.js
index db26004eb..ea5e098a7 100644
--- a/src/utils/array/matrix/RotateMatrix.js
+++ b/src/utils/array/matrix/RotateMatrix.js
@@ -37,11 +37,11 @@ var RotateMatrix = function (matrix, direction)
     if (direction === 90 || direction === -270 || direction === 'rotateLeft')
     {
         matrix = TransposeMatrix(matrix);
-        matrix = matrix.reverse();
+        matrix.reverse();
     }
     else if (direction === -90 || direction === 270 || direction === 'rotateRight')
     {
-        matrix = matrix.reverse();
+        matrix.reverse();
         matrix = TransposeMatrix(matrix);
     }
     else if (Math.abs(direction) === 180 || direction === 'rotate180')
@@ -51,7 +51,7 @@ var RotateMatrix = function (matrix, direction)
             matrix[i].reverse();
         }
 
-        matrix = matrix.reverse();
+        matrix.reverse();
     }
 
     return matrix;
diff --git a/src/utils/array/matrix/RotateRight.js b/src/utils/array/matrix/RotateRight.js
index f7889cc8a..c4be6a1cf 100644
--- a/src/utils/array/matrix/RotateRight.js
+++ b/src/utils/array/matrix/RotateRight.js
@@ -18,7 +18,7 @@ var RotateMatrix = require('./RotateMatrix');
  */
 var RotateRight = function (matrix)
 {
-    return RotateMatrix(matrix, 90);
+    return RotateMatrix(matrix, -90);
 };
 
 module.exports = RotateRight;