diff --git a/views/helpers/IiifManifest.php b/views/helpers/IiifManifest.php
index f377d7ee..a42a62a6 100644
--- a/views/helpers/IiifManifest.php
+++ b/views/helpers/IiifManifest.php
@@ -966,7 +966,7 @@ protected function _getWidthAndHeight($filepath)
                 unlink($tempname);
             }
         } elseif (file_exists($filepath)) {
-            list($width, $height) = getimagesize($filepath);
+            $result = getimagesize($filepath);
             if ($result) {
                 list($width, $height) = $result;
             }