diff --git a/components/dfs/filesystems/elmfat/dfs_elm.c b/components/dfs/filesystems/elmfat/dfs_elm.c
index c9812181ae883da782aecff569147592a06cad59..08218b1461aca30a76d846e5dc1ad6957e2e3f1f 100644
--- a/components/dfs/filesystems/elmfat/dfs_elm.c
+++ b/components/dfs/filesystems/elmfat/dfs_elm.c
@@ -105,7 +105,7 @@ int dfs_elm_mount(struct dfs_filesystem *fs, unsigned long rwflag, const void *d
 	if (result == FR_OK)
 	{
 		extern FRESULT chk_mounted(const TCHAR **path, FATFS **rfs, BYTE chk_wp);
-		extern void leavefs(FATFS*	fs, int res);
+		extern int leavefs(FATFS*	fs, int res);
 		char driver[16];
 		const char * path;
 		DIR dj;
diff --git a/components/dfs/filesystems/elmfat/ff.c b/components/dfs/filesystems/elmfat/ff.c
index ea09720d3b44bb0ce41bc5d06f18de268bdad575..c8c27f6c0a26736b479f8d68bf63f73ed5f67fcb 100644
--- a/components/dfs/filesystems/elmfat/ff.c
+++ b/components/dfs/filesystems/elmfat/ff.c
@@ -4020,7 +4020,7 @@ int elm_get_vol(FATFS *fat)
 }
 #endif
 
-void leavefs(FATFS*	fs, int res)
+int leavefs(FATFS*	fs, int res)
 {
 	LEAVE_FF(fs, res);
 }