diff --git a/library/HTMLPurifier/Strategy/MakeWellFormed.php b/library/HTMLPurifier/Strategy/MakeWellFormed.php
index e389e001..f027d138 100644
--- a/library/HTMLPurifier/Strategy/MakeWellFormed.php
+++ b/library/HTMLPurifier/Strategy/MakeWellFormed.php
@@ -534,12 +534,17 @@ class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
      */
     protected function processToken($token, $injector = -1)
     {
+        // Zend OpCache miscompiles $token = array($token), so
+        // avoid this pattern.  See: https://github.com/ezyang/htmlpurifier/issues/108
+
         // normalize forms of token
         if (is_object($token)) {
-            $token = array(1, $token);
+            $tmp = $token;
+            $token = array(1, $tmp);
         }
         if (is_int($token)) {
-            $token = array($token);
+            $tmp = $token;
+            $token = array($tmp);
         }
         if ($token === false) {
             $token = array(1);