--- a/src/server/plugins/postgresql/vfs.c	Sun May 08 12:27:43 2022 +0200
+++ b/src/server/plugins/postgresql/vfs.c	Sun May 08 18:55:36 2022 +0200
@@ -51,7 +51,8 @@
     pg_vfs_io_seek,
     pg_vfs_io_close,
     NULL, // no pg aio implementation yet
-    NULL
+    NULL,
+    pg_vfs_io_getetag
 };
 
 static VFS_DIRIO pg_vfs_dirio_class = {
@@ -805,6 +806,9 @@
     pool_free(pool, fd);
 }
 
+const char *pg_vfs_io_getetag(SYS_FILE fd) {
+    return NULL;
+}
 
 /* -------------------------- VFS_DIRIO functions -------------------------- */