diff --git a/lib/Diff/Renderer/Html/Array.php b/lib/Diff/Renderer/Html/Array.php
index 521601c6..6203c0b2 100644
--- a/lib/Diff/Renderer/Html/Array.php
+++ b/lib/Diff/Renderer/Html/Array.php
@@ -150,7 +150,7 @@ private function getChangeExtent($fromLine, $toLine)
 	{
 		$start = 0;
 		$limit = min(strlen($fromLine), strlen($toLine));
-		while($start < $limit && $fromLine{$start} == $toLine{$start}) {
+		while ($start < $limit && $fromLine[$start] == $toLine[$start]) {
 			++$start;
 		}
 		$end = -1;