diff --git a/vllm/renderers/base.py b/vllm/renderers/base.py
index b468712adb0c..8816d1cbe65a 100644
--- a/vllm/renderers/base.py
+++ b/vllm/renderers/base.py
@@ -648,6 +648,8 @@ def _process_tokens(
 
         if prompt_text := prompt.get("prompt"):
             inputs["prompt"] = prompt_text
+        elif self.tokenizer is not None:
+            inputs["prompt"] = self.tokenizer.decode(prompt_token_ids)
         if cache_salt := prompt.get("cache_salt"):
             inputs["cache_salt"] = cache_salt