diff --git a/src/Parsoid/RefGroup.php b/src/Parsoid/RefGroup.php
index 3a68b1143..346f8b053 100644
--- a/src/Parsoid/RefGroup.php
+++ b/src/Parsoid/RefGroup.php
@@ -117,7 +117,8 @@ class RefGroup {
 			$li->insertBefore( $span, $reftextSpan );
 
 			foreach ( $ref->linkbacks as $i => $lb ) {
-				$span->appendChild( self::createLinkback( $lb, $refGroup, (string)( $i + 1 ), $ownerDoc, $env )
+				$span->appendChild(
+					self::createLinkback( $lb, $refGroup, (string)( $i + 1 ), $ownerDoc, $env )
 				);
 			}
 		}
diff --git a/src/Parsoid/References.php b/src/Parsoid/References.php
index 3d161f5c1..c9107c3a6 100644
--- a/src/Parsoid/References.php
+++ b/src/Parsoid/References.php
@@ -185,7 +185,10 @@ class References implements ExtensionTag, SerialHandler {
 			]
 		);
 		DOMDataUtils::addTypeOf( $linkBack, 'mw:Extension/ref' );
-		$dataParsoid = (object)[ 'src' => $nodeDp->src ];
+		$dataParsoid = (object)[];
+		if ( isset( $nodeDp->src ) ) {
+			$dataParsoid->src = $nodeDp->src;
+		}
 		if ( isset( $nodeDp->dsr ) ) {
 			$dataParsoid->dsr = $nodeDp->dsr;
 		}