diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5dc3f738..821541d3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - Commands: add `/usage` as an alias for `/status`. (#492) — thanks @lc0rp
 - Models/Auth: add MiniMax Anthropic-compatible API onboarding (minimax-api). (#590) — thanks @mneves75
 - Models: centralize model override validation + hooks Gmail warnings in doctor. (#602) — thanks @steipete
+- Agents: avoid base-to-string error stringification in model fallback. (#604) — thanks @steipete
 - Commands: harden slash command registry and list text-only commands in `/commands`.
 - Models/Auth: show per-agent auth candidates in `/model status`, and add `clawdbot models auth order {get,set,clear}` (per-agent auth rotation overrides). — thanks @steipete
 - Debugging: add raw model stream logging flags and document gateway watch mode.