diff --git a/java/src/edu/wpi/first/wpilibj/tables/ITableListener.java b/java/src/edu/wpi/first/wpilibj/tables/ITableListener.java
index 30c0115b2c..e1d925942e 100644
--- a/java/src/edu/wpi/first/wpilibj/tables/ITableListener.java
+++ b/java/src/edu/wpi/first/wpilibj/tables/ITableListener.java
@@ -6,6 +6,7 @@ package edu.wpi.first.wpilibj.tables;
  * @author Mitchell
  *
  */
+@FunctionalInterface
 public interface ITableListener {
     /**
      * Called when a key-value pair is changed in a {@link ITable}