diff --git a/wpilibNewCommands/src/main/java/edu/wpi/first/wpilibj2/command/ParallelDeadlineGroup.java b/wpilibNewCommands/src/main/java/edu/wpi/first/wpilibj2/command/ParallelDeadlineGroup.java
index 0e6f110a56..8acfea8a55 100644
--- a/wpilibNewCommands/src/main/java/edu/wpi/first/wpilibj2/command/ParallelDeadlineGroup.java
+++ b/wpilibNewCommands/src/main/java/edu/wpi/first/wpilibj2/command/ParallelDeadlineGroup.java
@@ -50,7 +50,7 @@ public class ParallelDeadlineGroup extends Command {
    * @param deadline the command that determines when the group ends
    * @throws IllegalArgumentException if the deadline command is already in the composition
    */
-  public void setDeadline(Command deadline) {
+  public final void setDeadline(Command deadline) {
     @SuppressWarnings("PMD.CompareObjectsWithEquals")
     boolean isAlreadyDeadline = deadline == m_deadline;
     if (isAlreadyDeadline) {