diff --git a/testing/nxffs/nxffs_main.c b/testing/nxffs/nxffs_main.c
index 0fbd31e2e..4ab7edbd9 100644
--- a/testing/nxffs/nxffs_main.c
+++ b/testing/nxffs/nxffs_main.c
@@ -205,7 +205,7 @@ static inline char nxffs_randchar(void)
   int value = rand() % 63;
   if (value == 0)
     {
-      return '/';
+      return '0';
     }
   else if (value <= 10)
     {