diff --git a/src/mcp/server/fastmcp/server.py b/src/mcp/server/fastmcp/server.py
index f74566303..40cc8a0df 100644
--- a/src/mcp/server/fastmcp/server.py
+++ b/src/mcp/server/fastmcp/server.py
@@ -940,6 +940,7 @@ async def report_progress(self, progress: float, total: float | None = None, mes
             progress=progress,
             total=total,
             message=message,
+            related_request_id=self.request_id,
         )
 
     async def read_resource(self, uri: str | AnyUrl) -> Iterable[ReadResourceContents]: