diff --git a/frontend/textbooks/physics_8_ch1.html b/frontend/textbooks/physics_8_ch1.html
index ee4d7a8..e831347 100644
--- a/frontend/textbooks/physics_8_ch1.html
+++ b/frontend/textbooks/physics_8_ch1.html
@@ -1562,7 +1562,7 @@ function _initP1_iv6(){
       fill: '#0f172a', 'text-anchor': 'middle',
       text: b.name
     }));
-    g.dataset = b;
+    g._body = b;
     svg.appendChild(g);
   });
   /* Термометр (draggable group) */