diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7fb2923..865bc3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,7 @@
 
 - Fixed rendering `{{ block.super }}` with several levels of inheritance
 - Fixed checking dictionary values for nil in `default` filter
-- Fixed comparing string variables with string literals
+- Fixed comparing string variables with string literals, in Swift 4 string literals became `Substring` and thus couldn't be directly compared to strings.
 
 
 ## 0.10.1