diff --git a/CONTRUBUTING.md b/CONTRUBUTING.md
index a05000585..bc04d2abd 100644
--- a/CONTRUBUTING.md
+++ b/CONTRUBUTING.md
@@ -9,6 +9,7 @@ Please read this if you intend to contribute to the project.
 * Java files:
   * we follow the standard eclipse IDE (built in) code formatter with the following changes:
     * Tab policy: spaces only: 4
+  * We recommend using at least Eclipse [Mars](https://www.eclipse.org/mars/) IDE release. It seems that the Java code formatter line break handling has been changed between [Luna](https://www.eclipse.org/luna/) and Mars.
 * XML files:
   * we follow the standard eclipse IDE XML formatter with the following changes:
     * Indent using spaces only: 3