diff --git a/src/wp-includes/widgets.php b/src/wp-includes/widgets.php
index d1ad6baaa5..40bf54c528 100644
--- a/src/wp-includes/widgets.php
+++ b/src/wp-includes/widgets.php
@@ -164,6 +164,18 @@ class WP_Widget {
 		$this->control_options = wp_parse_args( $control_options, array('id_base' => $this->id_base) );
 	}
 
+	/**
+	 * PHP4 constructor
+	 *
+	 * @param string $id_base
+	 * @param string $name
+	 * @param array  $widget_options
+	 * @param array  $control_options
+	 */
+	public function WP_Widget( $id_base, $name, $widget_options = array(), $control_options = array() ) {
+		WP_Widget::__construct( $id_base, $name, $widget_options, $control_options );
+	}
+
 	/**
 	 * Constructs name attributes for use in form() fields
 	 *