diff --git a/wpilibc/src/main/native/cpp/Notifier.cpp b/wpilibc/src/main/native/cpp/Notifier.cpp
index 147beb4003..81cd017c24 100644
--- a/wpilibc/src/main/native/cpp/Notifier.cpp
+++ b/wpilibc/src/main/native/cpp/Notifier.cpp
@@ -161,11 +161,6 @@ void Notifier::SetName(std::string_view name) {
   HAL_SetNotifierName(m_notifier, buf.data(), &status);
 }
 
-void Notifier::SetHandler(std::function<void()> callback) {
-  std::scoped_lock lock(m_processMutex);
-  m_callback = callback;
-}
-
 void Notifier::SetCallback(std::function<void()> callback) {
   std::scoped_lock lock(m_processMutex);
   m_callback = callback;
diff --git a/wpilibc/src/main/native/include/frc/Notifier.h b/wpilibc/src/main/native/include/frc/Notifier.h
index 0bd54d46f7..53e980f474 100644
--- a/wpilibc/src/main/native/include/frc/Notifier.h
+++ b/wpilibc/src/main/native/include/frc/Notifier.h
@@ -82,15 +82,6 @@ class Notifier {
    */
   void SetName(std::string_view name);
 
-  /**
-   * Change the callback function.
-   *
-   * @param callback The callback function.
-   * @deprecated Use SetCallback() instead.
-   */
-  [[deprecated("Use SetCallback() instead.")]]
-  void SetHandler(std::function<void()> callback);
-
   /**
    * Change the callback function.
    *
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 8f381a03ff..1529af5bc6 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Notifier.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Notifier.java
@@ -155,22 +155,6 @@ public class Notifier implements AutoCloseable {
     NotifierJNI.setNotifierName(m_notifier.get(), name);
   }
 
-  /**
-   * Change the callback function.
-   *
-   * @param callback The callback function.
-   * @deprecated Use setCallback() instead.
-   */
-  @Deprecated(forRemoval = true, since = "2024")
-  public void setHandler(Runnable callback) {
-    m_processLock.lock();
-    try {
-      m_callback = callback;
-    } finally {
-      m_processLock.unlock();
-    }
-  }
-
   /**
    * Change the callback function.
    *