diff --git a/includes/ImageMap.php b/includes/ImageMap.php
index 24aae31..b2419fe 100644
--- a/includes/ImageMap.php
+++ b/includes/ImageMap.php
@@ -247,10 +247,7 @@ class ImageMap implements ParserFirstCallInitHook {
 			$attribs = [];
 			if ( $externLink ) {
 				// Get the 'target' and 'rel' attributes for external link.
-				$attribs = array_filter(
-					$parser->getExternalLinkAttribs( $title ),
-					fn ( $attr ) => $attr !== null
-				);
+				$attribs = $parser->getExternalLinkAttribs( $title );
 
 				$attribs['href'] = $title;
 				$attribs['class'] = 'plainlinks';