diff --git a/src/TODO b/src/TODO
index cb6844339..9e3d44fbe 100644
--- a/src/TODO
+++ b/src/TODO
@@ -1,6 +1,8 @@
 Before 4.6.0-pre2
 =================
 
+Crash in isalpha() in key.c is c=0xFFFF.
+
 get_byte() in view.c produces warnings in Valgrind.
 
 Don't allow stdout and stderr from extfs scripts pollute the screen.