diff --git a/Changelog.md b/Changelog.md
index bb891d2..3cf4cff 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -2,6 +2,11 @@
 
 ## Upcoming Changes
 
+Add counts for bad `realloc`s and `free`s that are printed at program's end.
+
+(A bad `realloc` or `free` is an attempted `realloc` or `free` of a memory
+location that wasn't `malloc`d or `realloc`d.)
+
 ## Version 2.10
 
 Internal refactorings.