diff --git a/wpilibc/src/main/native/include/frc/Notifier.h b/wpilibc/src/main/native/include/frc/Notifier.h
index 53e980f474..2841be4834 100644
--- a/wpilibc/src/main/native/include/frc/Notifier.h
+++ b/wpilibc/src/main/native/include/frc/Notifier.h
@@ -102,7 +102,7 @@ class Notifier {
    * The user-provided callback should be written so that it completes before
    * the next time it's scheduled to run.
    *
-   * @param period Period after which to to call the callback starting one
+   * @param period Period after which to call the callback starting one
    *               period after the call to this method.
    */
   void StartPeriodic(units::second_t period);
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Notifier.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Notifier.java
index 1529af5bc6..54aeaddea1 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Notifier.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Notifier.java
@@ -192,7 +192,7 @@ public class Notifier implements AutoCloseable {
    * <p>The user-provided callback should be written so that it completes before the next time it's
    * scheduled to run.
    *
-   * @param periodSeconds Period in seconds after which to to call the callback starting one period
+   * @param periodSeconds Period in seconds after which to call the callback starting one period
    *     after the call to this method.
    */
   public void startPeriodic(double periodSeconds) {