diff --git a/jquery.sketchable.js b/jquery.sketchable.js
index 1214449..37b181f 100644
--- a/jquery.sketchable.js
+++ b/jquery.sketchable.js
@@ -430,15 +430,16 @@
       var touches = e.originalEvent.changedTouches;
       for (var i = 0; i < touches.length; i++) {
         var touch = touches[i];
-        // Add the type of event to the touch object.
+        // Add event type and finger ID.
         touch.type = e.type;
+        touch.identifier = i;
         callback(touch);
       }
     } else {
       // Track only the current finger.
       var touch = e.originalEvent.touches[0];
-      // Add the type of event to the touch object.
       touch.type = e.type;
+      touch.identifier = 0;
       callback(touch);
     }
   };
diff --git a/sketchable.js b/sketchable.js
index fcb599a..ab755b8 100644
--- a/sketchable.js
+++ b/sketchable.js
@@ -439,15 +439,16 @@
       var touches = e.changedTouches;
       for (var i = 0; i < touches.length; i++) {
         var touch = touches[i];
-        // Add the type of event to the touch object.
+        // Add event type and finger ID.
         touch.type = e.type;
+        touch.identifier = i;
         callback(touch);
       }
     } else {
       // Track only the current finger.
       var touch = e.touches[0];
-      // Add the type of event to the touch object.
       touch.type = e.type;
+      touch.identifier = 0;
       callback(touch);
     }
     e.preventDefault();