diff --git a/src/passbook.c b/src/passbook.c
index 185ef01140b3a4b9a632b1a0c2a4d77a41ebe09a..c2063dc61a4f1d1a514267976053086949fb0f45 100644
--- a/src/passbook.c
+++ b/src/passbook.c
@@ -5,6 +5,11 @@
 
 #include "debug.h"
 
+/*
+ FIXME: the save command is a DoS. Allow this to be turned off
+        and ensure it is turned off when testing student submissions
+*/
+
 #ifdef PASSBOOK_LIBFUZZER
 #include <stdint.h>
 const char LIBFUZZER_INPUT_FILE[] = "libFuzzerInput.tmp";