diff --git a/stereo_camera/model-1_3.sdf b/stereo_camera/model-1_3.sdf
index 07a9709..21f74f8 100644
--- a/stereo_camera/model-1_3.sdf
+++ b/stereo_camera/model-1_3.sdf
@@ -3,10 +3,18 @@
   <model name="stereocamera">
     <link name="link">
       <pose>0.05 0.05 0.05 0 0 0</pose>
-      <gravity>false</gravity>
       <inertial>
         <mass>0.1</mass>
       </inertial>
+
+      <visual name="collision">
+        <geometry>
+          <box>
+            <size>0.1 0.1 0.1</size>
+          </box>
+        </geometry>
+      </visual>
+
       <visual name="visual">
         <geometry>
           <box>