diff --git a/src/assets.html b/src/assets.html
index 6e5c0dd..d4d9f3f 100644
--- a/src/assets.html
+++ b/src/assets.html
@@ -79,7 +79,8 @@
   id="wall"
   geometry
   material="shader: wall-shader; tex: #noiseTexture; env: #envmapWallTexture; repeat: 2 2; transparent: true; side: double"
-  wall>
+  wall
+  ></a-mixin>
 
 <a-mixin
   id="beatWrong"