diff --git a/include/nuttx/fs/fs.h b/include/nuttx/fs/fs.h
index 077b9800b2..a0c065ba11 100644
--- a/include/nuttx/fs/fs.h
+++ b/include/nuttx/fs/fs.h
@@ -365,7 +365,7 @@ extern "C"
  *
  ****************************************************************************/
 
-void weak_function fs_initialize(void);
+void fs_initialize(void);
 
 /* fs_foreachmountpoint.c ***************************************************/
 /****************************************************************************
diff --git a/sched/init/os_start.c b/sched/init/os_start.c
index dae073b22c..59929e0b5f 100644
--- a/sched/init/os_start.c
+++ b/sched/init/os_start.c
@@ -459,12 +459,7 @@ void os_start(void)
 #if CONFIG_NFILE_DESCRIPTORS > 0
   /* Initialize the file system (needed to support device drivers) */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (fs_initialize != NULL)
-#endif
-    {
-      fs_initialize();
-    }
+  fs_initialize();
 #endif
 
 #ifdef CONFIG_NET