diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 393a0e9..1191744 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -102,6 +102,7 @@
 		return;
 
 	free_percpu(fbc->counters);
+	fbc->counters = NULL;
 #ifdef CONFIG_HOTPLUG_CPU
 	mutex_lock(&percpu_counters_lock);
 	list_del(&fbc->list);