diff --git a/source/administration/backups.txt b/source/administration/backups.txt
index e330ad22448..9c910cc6efa 100644
--- a/source/administration/backups.txt
+++ b/source/administration/backups.txt
@@ -371,6 +371,11 @@ the snapshot has completed, use the following command in the
 
    .. include:: /includes/note-disable-profiling-fsynclock.rst
 
+   .. warning::
+
+      :program:`mongodump` cannot be used while the database is locked
+      with :dbcommand:`fsync` or :method:`db.fsyncLock()`.
+
 .. _backup-amazon-software-raid:
 
 Amazon EBS in Software RAID 10 Configuration
diff --git a/source/reference/mongodump.txt b/source/reference/mongodump.txt
index 268ff530d6e..23c0fde1a22 100644
--- a/source/reference/mongodump.txt
+++ b/source/reference/mongodump.txt
@@ -197,8 +197,10 @@ Options
    .. warning:: Use :option:`--forceTableScan` with extreme caution
       and consideration.
 
-   operations
+.. warning::
 
+   :program:`mongodump` cannot be used while the database is locked
+   with :dbcommand:`fsync` or :method:`db.fsyncLock()`.
 
 .. _mongodump-behavior: