diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/smartdashboard/FieldObject2d.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/smartdashboard/FieldObject2d.java
index 74d9928821..437630dcbe 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/smartdashboard/FieldObject2d.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/smartdashboard/FieldObject2d.java
@@ -149,5 +149,5 @@ public class FieldObject2d {
 
   String m_name;
   NetworkTableEntry m_entry;
-  private List<Pose2d> m_poses;
+  private final List<Pose2d> m_poses = new ArrayList<>();
 }