diff --git a/components/dfs/SConscript b/components/dfs/SConscript
index e88088b350..6ca534ef52 100644
--- a/components/dfs/SConscript
+++ b/components/dfs/SConscript
@@ -71,7 +71,7 @@ if 'RT_DFS_ELM_USE_LFN' in dir(rtconfig) and rtconfig.RT_DFS_ELM_USE_LFN:
 if 'RT_USING_DFS_ELMFAT' in dir(rtconfig) and rtconfig.RT_USING_DFS_ELMFAT:
     src_local = src_local + elmfat
 
-if 'RT_USING_DFS_NFS' in dir(rtconfig) and rtconfig.RT_USING_DFS_NFS:
+if 'RT_USING_DFS_NFS' in dir(rtconfig) and rtconfig.RT_USING_DFS_NFS and rtconfig.RT_USING_LWIP:
     src_local = src_local + nfs
     path = path + [RTT_ROOT + '/components/dfs/filesystems/nfs']
 
diff --git a/components/dfs/include/dfs_posix.h b/components/dfs/include/dfs_posix.h
index 502fc87c9d..d59421fd8d 100644
--- a/components/dfs/include/dfs_posix.h
+++ b/components/dfs/include/dfs_posix.h
@@ -75,7 +75,6 @@ typedef struct
 	int cur;
 } DIR;
 
-#define stat _stat
 #define statfs _statfs
 #define dirent _dirent