diff --git a/examples/gradle.properties b/examples/gradle.properties
index a3df92a6..5b4b99fd 100644
--- a/examples/gradle.properties
+++ b/examples/gradle.properties
@@ -6,5 +6,6 @@ mlPassword=admin
 xccProtocol=xcc
 # once ml-gradle applies a fix to handle non-public properties, we can upgrade to the latest CoRB version
 mlGradleVersion=4.1.1
+# need to keep an older version, until ml-gradle updates the corb task to handle non-public options fields
 corbVersion=2.4.6
 #corbVersion=2.5.1