diff --git a/releasenotes.txt b/releasenotes.txt
index 51ee1d681..d31909f82 100644
--- a/releasenotes.txt
+++ b/releasenotes.txt
@@ -1,7 +1,8 @@
 Release Notes for Cppcheck 2.13
 
 New checks:
--
+- passedByValueCallback for functions which take a parameter by value but are used as callbacks (subset of passedByValue)
+- returnImplicitInt for C functions without return type (previously reported as a debug message)
 
 Improved checking:
 -