diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39cdc3dde..a0d2d5dda 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ BUG FIXES:
 
 * plugin/sdk: Prevent empty strings from being replaces with default values: [GH-21806]
 * plugin/sdk: Ensure resource timeouts are not lost when there is an empty plan [GH-21814]
+* lang/funcs: Add missing map of bool support for `lookup` [GH-21863]
 
 ## 0.12.3 (June 24, 2019)