diff --git a/src/proxy.c b/src/proxy.c
index 9cf80bb..3c0f363 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -316,7 +316,7 @@ int proxy_run_request_upstream( struct proxier* proxy )
 	}
 
 	proxy->rsp_buf_size = rsp_buf_size;
-	return rsp_buf_size;
+	return 1;
 }
 
 /* Write an NBD reply back downstream. Return 0 on failure, 1 on success. */