diff --git a/src/fastmcp/server/middleware/caching.py b/src/fastmcp/server/middleware/caching.py
index b8c290954..cb2b49866 100644
--- a/src/fastmcp/server/middleware/caching.py
+++ b/src/fastmcp/server/middleware/caching.py
@@ -480,14 +480,15 @@ class ResponseCachingMiddleware(Middleware):
             return cached_value.unwrap()
 
         value: PromptResult = await call_next(context=context)
+        cached_value = CachablePromptResult.wrap(value)
 
         await self._get_prompt_cache.put(
             key=cache_key,
-            value=CachablePromptResult.wrap(value),
+            value=cached_value,
             ttl=self._get_prompt_settings.get("ttl", ONE_HOUR_IN_SECONDS),
         )
 
-        return value
+        return cached_value.unwrap()
 
     def _matches_tool_cache_settings(self, tool_name: str) -> bool:
         """Check if the tool matches the cache settings for tool calls."""