diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0375f7d06..7d9808424 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ FEATURES:
   * **New resource:** `azurerm_dns_cname_record` [GH-5013]
   * **New resource:** `azurerm_sql_database` [GH-5003]
   * **New resource:** `azurerm_sql_server` [GH-4991]
+  * **New interpolation function:** `signum` [GH-4854]
 
 IMPROVEMENTS: