diff --git a/wp-admin/network/site-info.php b/wp-admin/network/site-info.php
index 61fea29850..c245ef34a8 100644
--- a/wp-admin/network/site-info.php
+++ b/wp-admin/network/site-info.php
@@ -42,6 +42,10 @@ if ( ! $id ) {
 }
 
 $details = get_blog_details( $id );
+if ( ! $details ) {
+	wp_die( __( 'The requested site does not exist.' ) );
+}
+
 if ( ! can_edit_network( $details->site_id ) ) {
 	wp_die( __( 'You do not have permission to access this page.' ), 403 );
 }
diff --git a/wp-admin/network/site-settings.php b/wp-admin/network/site-settings.php
index 31980eebf8..c29507d0c5 100644
--- a/wp-admin/network/site-settings.php
+++ b/wp-admin/network/site-settings.php
@@ -39,6 +39,10 @@ if ( ! $id )
 	wp_die( __('Invalid site ID.') );
 
 $details = get_blog_details( $id );
+if ( ! $details ) {
+	wp_die( __( 'The requested site does not exist.' ) );
+}
+
 if ( !can_edit_network( $details->site_id ) )
 	wp_die( __( 'You do not have permission to access this page.' ), 403 );
 
diff --git a/wp-admin/network/site-themes.php b/wp-admin/network/site-themes.php
index 0042601bdc..44b6c5bd62 100644
--- a/wp-admin/network/site-themes.php
+++ b/wp-admin/network/site-themes.php
@@ -56,6 +56,10 @@ if ( ! $id )
 $wp_list_table->prepare_items();
 
 $details = get_blog_details( $id );
+if ( ! $details ) {
+	wp_die( __( 'The requested site does not exist.' ) );
+}
+
 if ( !can_edit_network( $details->site_id ) )
 	wp_die( __( 'You do not have permission to access this page.' ), 403 );
 
diff --git a/wp-admin/network/site-users.php b/wp-admin/network/site-users.php
index f29056509f..ae34c4771a 100644
--- a/wp-admin/network/site-users.php
+++ b/wp-admin/network/site-users.php
@@ -49,6 +49,10 @@ if ( ! $id )
 	wp_die( __('Invalid site ID.') );
 
 $details = get_blog_details( $id );
+if ( ! $details ) {
+	wp_die( __( 'The requested site does not exist' ) );
+}
+
 if ( ! can_edit_network( $details->site_id ) )
 	wp_die( __( 'You do not have permission to access this page.' ), 403 );
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c44230600a..3b8f7fa1b9 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-beta2-33143';
+$wp_version = '4.3-beta2-33144';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.