diff --git a/wp-admin/includes/ajax-actions.php b/wp-admin/includes/ajax-actions.php
index c5718aeb50..1c84d42009 100644
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -2868,7 +2868,7 @@ function wp_ajax_install_plugin() {
  		wp_send_json_error( $status );
 	}
 
-	$plugin_status = install_plugin_install_status( array( 'slug' => sanitize_key( $_POST['slug'] ) ) );
+	$plugin_status = install_plugin_install_status( $api );
 	activate_plugin( $plugin_status['file'] );
 
 	wp_send_json_success( $status );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 7b21893786..0326f314ab 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31344';
+$wp_version = '4.2-alpha-31345';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.