diff --git a/add-ons/pmpro-subscription-delays/remove-subscription-delay-for-members.php b/add-ons/pmpro-subscription-delays/remove-subscription-delay-for-members.php
index db2488f..5c527e3 100644
--- a/add-ons/pmpro-subscription-delays/remove-subscription-delay-for-members.php
+++ b/add-ons/pmpro-subscription-delays/remove-subscription-delay-for-members.php
@@ -1,43 +1,43 @@
 <?php
 /**
  * Remove subscription delay for current or past members. This will remove all subscription delays from checkout for any level if the user is an active member or had a prior level (and is renewing).
- * 
+ *
  * title: Subscription Delay that can only be used once.
  * layout: snippet
  * collection: add-ons, pmpro-subscription-delays
  * category: custom-fields
- * 
+ *
  * You can add this recipe to your site by creating a custom plugin
  * or using the Code Snippets plugin available for free in the WordPress repository.
  * Read this companion article for step-by-step directions on either method.
  * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
  */
- 
 function my_pmpro_remove_subscription_delay_for_members() {
 
-    // Do not run this code for logged-out users or while in the WordPress dashboard.
-    if ( is_admin() || ! is_user_logged_in() ) {
-        return;
-    }
+	// Do not run this code for logged-out users or while in the WordPress dashboard.
+	if ( is_admin() || ! is_user_logged_in() ) {
+		return;
+	}
+
+	// Check if the user has any old levels at any point in time.
+	$prev_member = false;
+	if ( ! pmpro_hasMembershipLevel() && is_user_logged_in() ) {
+		$order = new MemberOrder();
+		$lastorder = $order->getLastMemberOrder( NULL, array( 'success', 'cancelled' ));
+			if ( ! empty( $lastorder ) ) {
+				$prev_member = true;
+			}
+	}
 
-    // Check if the user has any old levels at any point in time.
-    $prev_member = false;
-    if ( ! pmpro_hasMembershipLevel() && is_user_logged_in() ) {
-        $order = new MemberOrder();
-        $lastorder = $order->getLastMemberOrder( NULL, array( 'success', 'cancelled' ));
-            if ( ! empty( $lastorder ) ) {
-                $prev_member = true;
-            }
-    }
-    
-    // If user currently has a membership level or previously had a membership level, remove custom trial.
-    if ( pmpro_hasMembershipLevel() || $prev_member ) {
-		remove_filter('pmpro_profile_start_date', 'pmprosd_pmpro_profile_start_date', 10, 2);
-		remove_action('pmpro_after_checkout', 'pmprosd_pmpro_after_checkout');
-		remove_filter('pmpro_next_payment', 'pmprosd_pmpro_next_payment', 10, 3);
-		remove_filter('pmpro_level_cost_text', 'pmprosd_level_cost_text', 10, 2);
-		remove_action('pmpro_save_discount_code_level', 'pmprosd_pmpro_save_discount_code_level', 10, 2);
+	// If user currently has a membership level or previously had a membership level, remove custom trial.
+	if ( pmpro_hasMembershipLevel() || $prev_member ) {
+		//for backwards compatibility with PMPro < 3.4
+		remove_filter( 'pmpro_profile_start_date', 'pmprosd_pmpro_profile_start_date', 10, 2 );
+		remove_filter( 'pmpro_checkout_level', 'pmprosd_pmpro_checkout_level' ); //for PMPro 3.4+
+		remove_action( 'pmpro_after_checkout', 'pmprosd_pmpro_after_checkout' );
+		remove_filter( 'pmpro_next_payment', 'pmprosd_pmpro_next_payment', 10, 3 );
+		remove_filter( 'pmpro_level_cost_text', 'pmprosd_level_cost_text', 10, 2 );
+		remove_action( 'pmpro_save_discount_code_level', 'pmprosd_pmpro_save_discount_code_level', 10, 2 );
 	}
-	
 }
 add_filter( 'init', 'my_pmpro_remove_subscription_delay_for_members' );
\ No newline at end of file