1 files changed, 1 insertions, 0 deletions
diff --git a/server/src/main/java/com/vaadin/event/ContextClickEvent.java b/server/src/main/java/com/vaadin/event/ContextClickEvent.java
index ecf53e2ba2..c1c779bd28 100644
--- a/server/src/main/java/com/vaadin/event/ContextClickEvent.java
+++ b/server/src/main/java/com/vaadin/event/ContextClickEvent.java
@@ -46,6 +46,7 @@ public class ContextClickEvent extends ClickEvent {
     /**
      * Listener for {@link ContextClickEvent ContextClickEvents}.
      */
+    @FunctionalInterface
     public interface ContextClickListener extends Serializable {
 
         /**