diff --git a/components/dfs/src/dfs.c b/components/dfs/src/dfs.c
index 18eb41bf10a0b158431e038ad54187ef38b60aa5..eaf865031084d7fb55b34aa45db98e685ffb89b2 100644
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@@ -297,6 +297,8 @@ char* dfs_normalize_path(const char* directory, const char* filename)
 
 	src = fullpath;
 	dst = fullpath;
+	
+	dst0 = dst;
 	while (1)
 	{
 		char c = *src;
diff --git a/components/dfs/src/dfs_file.c b/components/dfs/src/dfs_file.c
index fc63920d567e495cd97a4215833b886856e54e38..58d57ea3dac50ac49a04790371cd7cc899a69422 100644
--- a/components/dfs/src/dfs_file.c
+++ b/components/dfs/src/dfs_file.c
@@ -385,6 +385,7 @@ int dfs_file_rename(const char* oldpath, const char* newpath)
 	char *oldfullpath, *newfullpath;
 
 	result = DFS_STATUS_OK;
+	newfullpath = RT_NULL;
 
 	oldfullpath = dfs_normalize_path(RT_NULL, oldpath);
 	if ( oldfullpath == RT_NULL )