diff --git a/releasenotes-builder/config/checkstyle.properties b/releasenotes-builder/config/checkstyle.properties
index 914f2c7f..17d829c1 100644
--- a/releasenotes-builder/config/checkstyle.properties
+++ b/releasenotes-builder/config/checkstyle.properties
@@ -1,3 +1,5 @@
+# suppress inspection "UnusedProperty" for whole file
+# properties are used at "misc/build.xml"
 checkstyle.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java.header
 checkstyle.importcontrol.file=config/import-control.xml
 checkstyle.importcontroltest.file=config/import-control-test.xml