Index: modules/memcache/memcache.inc
===================================================================
--- modules/memcache/memcache.inc	
+++ modules/memcache/memcache.inc
@@ -295,7 +295,9 @@
     $wildcard = dmemcache_key('.wildcard-' . $cid, $table);
     if (isset($wildcards[$table][$wildcard]) && $wildcards[$table][$wildcard] != 0) {
       $mc = dmemcache_object($table);
-      $mc->increment($wildcard);
+      if ($mc) {
+        $mc->increment($wildcard);
+      }
       $wildcards[$table][$wildcard]++;
     }
     else {