diff --git a/src/ruler.js b/src/ruler.js
index ce734e1..6a33362 100644
--- a/src/ruler.js
+++ b/src/ruler.js
@@ -52,7 +52,7 @@ export class DragRulerRuler extends Ruler {
 			return measure.call(this, destination, options);
 		}
 		else {
-			return super.measure(mestination, options);
+			return super.measure(destination, options);
 		}
 	}