Index: wp-admin/includes/media.php
===================================================================
--- wp-admin/includes/media.php	(revision 15275)
+++ wp-admin/includes/media.php	(working copy)
@@ -1291,7 +1291,9 @@
 		$calling_post_id = $post->post_parent;
 	if ( 'image' == $type && $calling_post_id && current_theme_supports( 'post-thumbnails', get_post_type( $calling_post_id ) ) && get_post_thumbnail_id( $calling_post_id ) != $attachment_id ) {
 		$ajax_nonce = wp_create_nonce( "set_post_thumbnail-$calling_post_id" );
-		$thumbnail = "<a class='wp-post-thumbnail' id='wp-post-thumbnail-" . $attachment_id . "' href='#' onclick='WPSetAsThumbnail(\"$attachment_id\", \"$ajax_nonce\");return false;'>" . esc_html__( "Use as featured image" ) . "</a>";
+		$link_text = esc_html__( "Use as featured image" ) ;
+		$link_text = apply_filters('media_feature_image_text', array( 'text' =>$link_text, 'post-type' => get_post_type( $calling_post_id )));
+		$thumbnail = "<a class='wp-post-thumbnail' id='wp-post-thumbnail-" . $attachment_id . "' href='#' onclick='WPSetAsThumbnail(\"$attachment_id\", \"$ajax_nonce\");return false;'>" . $link_text . "</a>";
 	}
 
 	if ( ( $send || $thumbnail || $delete ) && !isset( $form_fields['buttons'] ) )