diff --git a/Android.md b/Android.md
index 309b4e8..c7c01a4 100644
--- a/Android.md
+++ b/Android.md
@@ -180,6 +180,7 @@ public class EbitenGLSurfaceView extends GLSurfaceView {
             int id = e.getPointerId(i);
             int x = (int)e.getX(i);
             int y = (int)e.getY(i);
+            // The position is in dp.
             Inovation.UpdateTouchesOnAndroid(e.getActionMasked(), id, (int)pxToDp(x), (int)pxToDp(y));
         }
         return true;