diff --git a/c-programming/experiments/reverse-ramdisk.c b/c-programming/experiments/reverse-ramdisk.c
index b7630b0..309d171 100644
--- a/c-programming/experiments/reverse-ramdisk.c
+++ b/c-programming/experiments/reverse-ramdisk.c
@@ -13,6 +13,7 @@
  * GCC/Clang/TCC/LCC: Compile with -DTEST to set macro TEST as defined, and/or
  * with -DDEBUG to enable debug mode
  *
+ * TODO:XXX: Fix segmentation fault on second call of `tf_free`
  * TODO: Test: Automate the test verification
  *
  * Author: Intel A80486DX2-66