diff --git a/.github/next-minor.md b/.github/next-minor.md
index 2b8355528..cea9ec7a7 100644
--- a/.github/next-minor.md
+++ b/.github/next-minor.md
@@ -4,7 +4,9 @@ The `####` headline should be short and descriptive of the new functionality. In
 
 ## New Functions
 
-####
+#### isUndefined
+
+https://github.com/radashi-org/radashi/pull/305
 
 ## New Features