diff --git a/CHANGELOG.md b/CHANGELOG.md
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+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## 0.12.0-beta2 (Unreleased)
 
+IMPROVEMENTS:
+
+* The warning for undeclared variables in `.tfvars` files now consolidates multiple warnings when there are more than three, to avoid an overwhelming wall of warnings in situations where a common `.tfvars` file is used across many configurations. Setting "global" variables in `.tfvars` is deprecated for v0.12 and should be replaced with the `TF_VAR_...` environment variables. [GH-20581]
 
 ## 0.12.0-beta1 (Feb 28, 2019)