diff --git a/wpimath/src/main/java/edu/wpi/first/math/filter/LinearFilter.java b/wpimath/src/main/java/edu/wpi/first/math/filter/LinearFilter.java
index e91ab504a4..93d6bea9e4 100644
--- a/wpimath/src/main/java/edu/wpi/first/math/filter/LinearFilter.java
+++ b/wpimath/src/main/java/edu/wpi/first/math/filter/LinearFilter.java
@@ -152,6 +152,7 @@ public class LinearFilter {
    * @param samples The number of samples to use to compute the given derivative. This must be one
    *     more than the order of derivative or higher.
    * @param period The period in seconds between samples taken by the user.
+   * @return Linear filter.
    */
   @SuppressWarnings("LocalVariableName")
   public static LinearFilter backwardFiniteDifference(int derivative, int samples, double period) {