diff --git a/CHANGES.md b/CHANGES.md
index 2fe9b48d..e742987c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -7,3 +7,5 @@ Changes in v2.0b1
 
 - Now require libcups v3 or higher.
 - Increased `PAPPL_MAX_TYPE` to 128 (Issue #268)
+- Updated APIs to use `size_t` for counts instead of `int`, for compatibility
+  with libcups v3 (Issue #221)