diff --git a/CHANGELOG.md b/CHANGELOG.md
index f81c888c473f..a004f1a3bd56 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## 3.39.0 (Unreleased)
 
+FEATURES:
+
+* **New Data Source:** `azurerm_cost_anomaly_alert` [GH-19899]
 
 ENHANCEMENTS: