diff --git a/core/block_drag_surface.js b/core/block_drag_surface.js
index e394ab7d5..5e2e121c7 100644
--- a/core/block_drag_surface.js
+++ b/core/block_drag_surface.js
@@ -232,8 +232,7 @@ Blockly.BlockDragSurfaceSvg.prototype.getCurrentBlock = function() {
  */
 Blockly.BlockDragSurfaceSvg.prototype.getWsTranslation = function() {
   // Returning a copy so the coordinate can not be changed outside this class.
-  return new Blockly.utils.Coordinate(
-      this.childSurfaceXY_.x, this.childSurfaceXY_.y);
+  return this.childSurfaceXY_.clone();
 };
 
 /**
diff --git a/core/utils/coordinate.js b/core/utils/coordinate.js
index da196acea..edf513b28 100644
--- a/core/utils/coordinate.js
+++ b/core/utils/coordinate.js
@@ -100,6 +100,14 @@ Blockly.utils.Coordinate.sum = function(a, b) {
   return new Blockly.utils.Coordinate(a.x + b.x, a.y + b.y);
 };
 
+/**
+ * Creates a new copy of this coordinate.
+ * @return {!Blockly.utils.Coordinate} A copy of this coordinate.
+ */
+Blockly.utils.Coordinate.prototype.clone = function() {
+  return new Blockly.utils.Coordinate(this.x, this.y);
+};
+
 /**
  * Scales this coordinate by the given scale factor.
  * @param {number} s The scale factor to use for both x and y dimensions.