diff --git a/src/runtime-three/runtime-host.ts b/src/runtime-three/runtime-host.ts
index e5a75b70..263bb847 100644
--- a/src/runtime-three/runtime-host.ts
+++ b/src/runtime-three/runtime-host.ts
@@ -4,6 +4,7 @@ import {
   AnimationMixer,
   BufferGeometry,
   DirectionalLight,
+  Euler,
   Group,
   LoopOnce,
   LoopRepeat,