diff --git a/src/context.c b/src/context.c
index 8f02f19e..25f9a160 100644
--- a/src/context.c
+++ b/src/context.c
@@ -218,5 +218,6 @@ void mosquitto__free_disused_contexts(struct mosquitto_db *db)
 		mqtt3_context_cleanup(db, context, true);
 		context = next;
 	}
+	db->ll_for_free = NULL;
 }