diff --git a/includes/handlers.inc b/includes/handlers.inc
index 6c1e887..42d9e96 100644
--- a/includes/handlers.inc
+++ b/includes/handlers.inc
@@ -1604,13 +1604,15 @@ class views_join {
             if (is_array($info['value'])) {
               // With an array of values, we need multiple placeholders and the
               // 'IN' operator is implicit.
+              $local_placeholders = array();
               foreach ($info['value'] as $value) {
                 $placeholder_i = ':views_join_condition_' . $select_query->nextPlaceholder();
+                $local_placeholders[] = $placeholder_i;
                 $arguments[$placeholder_i] = $value;
               }
 
               $operator = !empty($info['operator']) ? $info['operator'] : 'IN';
-              $placeholder = '( ' . implode(', ', array_keys($arguments)) . ' )';
+              $placeholder = '( ' . implode(', ', $local_placeholders) . ' )';
             }
             else {
               // With a single value, the '=' operator is implicit.