diff --git a/memcache.inc b/memcache.inc
index 547d9c4..0329fb2 100644
--- a/memcache.inc
+++ b/memcache.inc
@@ -335,7 +335,7 @@ class MemCacheDrupal implements DrupalCacheInterface {
       }
       $key = '.wildcard-' . $cid;
       if (isset($wildcards[$this->bin][$key]) && $wildcards[$this->bin][$key] != 0) {
-        $this->memcache->increment($key);
+        $this->memcache->increment(dmemcache_key($key, $this->bin));
         $wildcards[$this->bin][$key]++;
       }
       else {