diff --git a/contrib/plugins/cache.c b/contrib/plugins/cache.c
index bf0d2f6097..4a71602639 100644
--- a/contrib/plugins/cache.c
+++ b/contrib/plugins/cache.c
@@ -200,7 +200,7 @@ static void fifo_destroy(Cache *cache)
 {
     int i;
 
-    for (i = 0; i < cache->assoc; i++) {
+    for (i = 0; i < cache->num_sets; i++) {
         g_queue_free(cache->sets[i].fifo_queue);
     }
 }