diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index ba1bdb197ba..26cb2ff4b42 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -639,10 +639,7 @@ void CTxMemPool::removeForReorg(CChain& chain, std::function<bool(txiter)> check
     }
     RemoveStaged(setAllRemoves, false, MemPoolRemovalReason::REORG);
     for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++) {
-        const LockPoints lp{it->GetLockPoints()};
-        if (!TestLockPointValidity(chain, lp)) {
-            mapTx.modify(it, update_lock_points(lp));
-        }
+        assert(TestLockPointValidity(chain, it->GetLockPoints()));
     }
 }
 
diff --git a/src/validation.cpp b/src/validation.cpp
index 203bd576765..68729e48637 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -378,6 +378,8 @@ void CChainState::MaybeUpdateMempoolForReorg(
                 }
             }
         }
+        // CheckSequenceLocks updates lp. Update the mempool entry LockPoints.
+        if (!validLP) m_mempool->mapTx.modify(it, update_lock_points(lp));
         return should_remove;
     };