diff --git a/src/bank.cpp b/src/bank.cpp
index 0a788fe..ffea911 100644
--- a/src/bank.cpp
+++ b/src/bank.cpp
@@ -203,13 +203,20 @@ BankResponse Bank::PruneUsers(time_t threshold_time, uint32_t threshold_bal) noe
     size_t deleted_count = 0;
     for (const auto &u : users)
     {
-        users.erase_if(u.first, [threshold_time, threshold_bal, &deleted_count](User &u) -> bool {
+        users.erase_if(u.first, [this, threshold_time, threshold_bal, &deleted_count](User &u) -> bool {
 #if MAX_LOG_SIZE > 0
             if (u.log.data.back().time < threshold_time && u.balance < threshold_bal)
 #else
             if (u.balance < threshold_bal)
 #endif
             {
+#if CONSERVATIVE_DISK_SAVE
+#if MULTI_THREADED
+                save_flag.SetChangesOn();
+#else
+                save_flag = true;
+#endif
+#endif
                 return ++deleted_count;
             }
             else