diff --git a/diffsynth/pipelines/wan_video.py b/diffsynth/pipelines/wan_video.py
index fdbcfc9..b344423 100644
--- a/diffsynth/pipelines/wan_video.py
+++ b/diffsynth/pipelines/wan_video.py
@@ -159,7 +159,7 @@ class WanVideoPipeline(BasePipeline):
 
 
     def encode_prompt(self, prompt, positive=True):
-        prompt_emb = self.prompter.encode_prompt(prompt, positive=positive)
+        prompt_emb = self.prompter.encode_prompt(prompt, positive=positive, device=self.device)
         return {"context": prompt_emb}