diff --git a/wp-includes/cron.php b/wp-includes/cron.php
index f7e444b83e..69502a3e45 100644
--- a/wp-includes/cron.php
+++ b/wp-includes/cron.php
@@ -191,7 +191,7 @@ function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
 }
 
 /**
- * Unschedule all events attached to the specified hook.
+ * Unschedule all events attached to the hook with the specified arguments.
  *
  * @since 2.1.0
  *
@@ -221,6 +221,29 @@ function wp_clear_scheduled_hook( $hook, $args = array() ) {
 	}
 }
 
+/**
+ * Unschedule all events attached to the hook.
+ *
+ * Can be useful for plugins when deactivating to clean up the cron queue.
+ *
+ * @since 4.9.0
+ *
+ * @param string $hook Action hook, the execution of which will be unscheduled.
+ */
+function wp_unschedule_hook( $hook ) {
+	$crons = _get_cron_array();
+
+	foreach( $crons as $timestamp => $args ) {
+		unset( $crons[ $timestamp ][ $hook ] );
+
+		if ( empty( $crons[ $timestamp ] ) ) {
+			unset( $crons[ $timestamp ] );
+		}
+	}
+
+	_set_cron_array( $crons );
+}
+
 /**
  * Retrieve the next timestamp for an event.
  *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5361953162..a4401006a7 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-40964';
+$wp_version = '4.9-alpha-40965';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.