diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f4b8c3..3318023 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 
 * optional detection of integer variables and integer predicate parameters
 * command-line option `--detect-integers` to enable integer variable detection
+* support for declaring functions integer with the `#external` directive
 
 ## 0.1.8 (2018-04-20)