diff --git a/src/Parser/CssToXpath.php b/src/Parser/CssToXpath.php
index 53e0bfa..3744d18 100644
--- a/src/Parser/CssToXpath.php
+++ b/src/Parser/CssToXpath.php
@@ -50,7 +50,7 @@ public static function processAttr($attr, $element, $hash) {
 
 		$parser = new \Transphporm\Parser\Value($functionSet, true);
 		$return = $parser->parseTokens($attr, $attributes);
-		return $return[0] === '' ? false : $return[0];		
+		return is_array($return[0]) || $return[0] === '' ? false : $return[0];
 	}
 
 	public function cleanup() {
@@ -97,7 +97,7 @@ private function removeSpacesFromDirectDecend($css) {
 			$tokens->add($split[$i]->trim());
 			if (isset($split[$i+1])) $tokens->add(['type' => Tokenizer::GREATER_THAN]);
 		}
-		
+
 		return $tokens;
 	}