diff --git a/lib/Sabberworm/CSS/Parser.php b/lib/Sabberworm/CSS/Parser.php
index 40a92d54..98abb2b0 100644
--- a/lib/Sabberworm/CSS/Parser.php
+++ b/lib/Sabberworm/CSS/Parser.php
@@ -532,7 +532,7 @@ private function consumeUntil($aEnd, $bIncludeEnd = false) {
 			}
 		}
 		if ($iEndPos === null) {
-			throw new UnexpectedTokenException($aEnd, $this->peek(5), 'search');
+			throw new UnexpectedTokenException(print_r($aEnd, true), $this->peek(5), 'search');
 		}
 		return $this->consume($iEndPos - $this->iCurrentPosition);
 	}