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-rw-r--r--components/dfs/filesystems/elmfat/ffconf.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/components/dfs/filesystems/elmfat/ffconf.h b/components/dfs/filesystems/elmfat/ffconf.h
index bfe0ec7bc1..cbf5efcdcd 100644
--- a/components/dfs/filesystems/elmfat/ffconf.h
+++ b/components/dfs/filesystems/elmfat/ffconf.h
@@ -90,9 +90,9 @@
*/
-#ifdef RT_DFS_ELM_USE_LFN
-#define _USE_LFN 1
-#define _MAX_LFN RT_DFS_ELM_MAX_LFN
+#if RT_DFS_ELM_USE_LFN
+#define _USE_LFN RT_DFS_ELM_USE_LFN
+#define _MAX_LFN RT_DFS_ELM_MAX_LFN
#else
#define _USE_LFN 0 /* 0 to 3 */
#define _MAX_LFN 255 /* Maximum LFN length to handle (12 to 255) */