diff --git a/libretro-common/file/config_file.c b/libretro-common/file/config_file.c
index 78c5c12919..3c75d929c2 100644
--- a/libretro-common/file/config_file.c
+++ b/libretro-common/file/config_file.c
@@ -908,6 +908,7 @@ bool config_file_write(config_file_t *conf, const char *path)
       if (!file)
          return false;
 #ifdef WIIU
+      /* TODO: use FBF everywhere once https://i.imgur.com/muVhNeF.jpg is fixed */
       setvbuf(file, NULL, _IONBF, 0x4000);
 #else
       setvbuf(file, NULL, _IOFBF, 0x4000);