diff --git a/src/refpool.c b/src/refpool.c
index 63d28fa..74dd8e0 100644
--- a/src/refpool.c
+++ b/src/refpool.c
@@ -76,6 +76,9 @@ dtor(void *ptr)
 		free(pool->data);
 
 	top = pool->prev;
+
+	if (top != NULL)
+		top->next = NULL;
 }
 
 bool