diff --git a/db/db_impl/db_impl_write.cc b/db/db_impl/db_impl_write.cc
index 6aaff802d..39657d462 100644
--- a/db/db_impl/db_impl_write.cc
+++ b/db/db_impl/db_impl_write.cc
@@ -1882,9 +1882,11 @@ void DBImpl::NotifyOnMemTableSealed(ColumnFamilyData* /*cfd*/,
     return;
   }
 
+  mutex_.Unlock();
   for (auto listener : immutable_db_options_.listeners) {
     listener->OnMemTableSealed(mem_table_info);
   }
+  mutex_.Lock();
 }
 #endif  // ROCKSDB_LITE
 
@@ -2085,11 +2087,9 @@ Status DBImpl::SwitchMemtable(ColumnFamilyData* cfd, WriteContext* context) {
                                      mutable_cf_options);
 
 #ifndef ROCKSDB_LITE
-  mutex_.Unlock();
   // Notify client that memtable is sealed, now that we have successfully
   // installed a new memtable
   NotifyOnMemTableSealed(cfd, memtable_info);
-  mutex_.Lock();
 #endif  // ROCKSDB_LITE
   // It is possible that we got here without checking the value of i_os, but
   // that is okay.  If we did, it most likely means that s was already an error.