diff --git a/mongodb/src/main/java/com/yahoo/ycsb/db/AsyncMongoDbClient.java b/mongodb/src/main/java/com/yahoo/ycsb/db/AsyncMongoDbClient.java
index 89eb7d2500..8b7920810e 100644
--- a/mongodb/src/main/java/com/yahoo/ycsb/db/AsyncMongoDbClient.java
+++ b/mongodb/src/main/java/com/yahoo/ycsb/db/AsyncMongoDbClient.java
@@ -462,7 +462,7 @@ public final Status update(final String table, final String key,
       }
       final long res =
           collection.update(query, update, false, false, writeConcern);
-      return res == 1 ? Status.OK : Status.NOT_FOUND;
+      return writeConcern == Durability.NONE || res == 1 ? Status.OK : Status.NOT_FOUND;
     } catch (final Exception e) {
       System.err.println(e.toString());
       return Status.ERROR;