diff --git a/control_plane/src/local_env.rs b/control_plane/src/local_env.rs
index c7f22cc8f8..bd3dbef453 100644
--- a/control_plane/src/local_env.rs
+++ b/control_plane/src/local_env.rs
@@ -127,8 +127,8 @@ pub struct PageServerConf {
     pub pg_auth_type: AuthType,
     pub http_auth_type: AuthType,
 
-    pub(crate) virtual_file_io_engine: String,
-    pub(crate) get_vectored_impl: String,
+    pub(crate) virtual_file_io_engine: Option<String>,
+    pub(crate) get_vectored_impl: Option<String>,
 }
 
 impl Default for PageServerConf {
@@ -139,9 +139,8 @@ impl Default for PageServerConf {
             listen_http_addr: String::new(),
             pg_auth_type: AuthType::Trust,
             http_auth_type: AuthType::Trust,
-            // FIXME: use the ones exposed by pageserver crate
-            virtual_file_io_engine: "tokio-epoll-uring".to_owned(),
-            get_vectored_impl: "sequential".to_owned(),
+            virtual_file_io_engine: None,
+            get_vectored_impl: None,
         }
     }
 }
diff --git a/control_plane/src/pageserver.rs b/control_plane/src/pageserver.rs
index 2603515681..c5eabc46db 100644
--- a/control_plane/src/pageserver.rs
+++ b/control_plane/src/pageserver.rs
@@ -101,8 +101,16 @@ impl PageServerNode {
 
         let pg_auth_type_param = format!("pg_auth_type='{}'", pg_auth_type);
         let listen_pg_addr_param = format!("listen_pg_addr='{}'", listen_pg_addr);
-        let virtual_file_io_engine = format!("virtual_file_io_engine='{virtual_file_io_engine}'");
-        let get_vectored_impl = format!("get_vectored_impl='{get_vectored_impl}'");
+        let virtual_file_io_engine = if let Some(virtual_file_io_engine) = virtual_file_io_engine {
+            format!("virtual_file_io_engine='{virtual_file_io_engine}'")
+        } else {
+            String::new()
+        };
+        let get_vectored_impl = if let Some(get_vectored_impl) = get_vectored_impl {
+            format!("get_vectored_impl='{get_vectored_impl}'")
+        } else {
+            String::new()
+        };
 
         let broker_endpoint_param = format!("broker_endpoint='{}'", self.env.broker.client_url());