1 files changed, 5 insertions, 1 deletions
diff --git a/demos/ARMCM4-STM32F407-LWIP-FATFS-USB/main.c b/demos/ARMCM4-STM32F407-LWIP-FATFS-USB/main.c
index e22710174..09a6ae3a6 100644
--- a/demos/ARMCM4-STM32F407-LWIP-FATFS-USB/main.c
+++ b/demos/ARMCM4-STM32F407-LWIP-FATFS-USB/main.c
@@ -125,6 +125,10 @@ static FRESULT scan_files(BaseSequentialStream *chp, char *path) {
   int i;
   char *fn;
 
+#if _USE_LFN
+  fno.lfname = 0;
+  fno.lfsize = 0;
+#endif
   res = f_opendir(&dir, path);
   if (res == FR_OK) {
     i = strlen(path);
@@ -141,7 +145,7 @@ static FRESULT scan_files(BaseSequentialStream *chp, char *path) {
         res = scan_files(chp, path);
         if (res != FR_OK)
           break;
-        path[i] = 0;
+        path[--i] = 0;
       }
       else {
         chprintf(chp, "%s/%s\r\n", path, fn);