diff --git a/data/urdf/hyq/hyq_trunk_large.urdf b/data/urdf/hyq/hyq_trunk_large.urdf
index 9b1e103a4f3e28a6b568b76581cf352b39ae40e6..ab1d4c1cf1a127fea1b5b4490bffe810c4020046 100755
--- a/data/urdf/hyq/hyq_trunk_large.urdf
+++ b/data/urdf/hyq/hyq_trunk_large.urdf
@@ -5,7 +5,7 @@
      <inertia ixx="1." ixy="0.0" ixz="0.0" iyy="1." iyz="0.0" izz="1."/>
   </inertial>
     <visual>
-      <origin xyz="0 0 0" rpy="0 0 0" scale="2 2 2"/>
+      <origin xyz="0 0 0" rpy="0 0 0"/>
       <geometry>
         <mesh filename="package://hpp-rbprm-corba/meshes/hyq/hyq_all.stl"/>
       </geometry>
@@ -14,9 +14,9 @@
       </material>
     </visual>
     <collision>
-      <origin xyz="0 0 0" rpy="0 0 0" scale="5 5 5"/>
+      <origin xyz="0 0 0" rpy="0 0 0"/>
       <geometry>
-        <mesh filename="package://hpp-rbprm-corba/meshes/hyq/hyq_trunk_large2.stl" scale="1 1 1"/>
+        <mesh filename="package://hpp-rbprm-corba/meshes/hyq/hyq_trunk_large.stl" />
       </geometry>
     </collision>
   </link>