diff --git a/releasenotes.txt b/releasenotes.txt
index 0114862e68c..ab79c15db37 100644
--- a/releasenotes.txt
+++ b/releasenotes.txt
@@ -2,7 +2,7 @@ Release Notes for Cppcheck 2.17
 
 New checks:
 - staticFunction: detect functions that should have internal linkage since they
-  are not used outside of their translation unit.
+  are not used outside of their translation unit (C code only).
 - Check null pointer return from memory/resource allocation functions (nullPointerOutOfMemory, nullPointerArithmeticOutOfMemory, nullPointerOutOfResources, ctunullpointerOutOfMemory, ctunullpointerOutOfResources).
 
 Improved checking: