diff --git a/cinder/tests/unit/volume/drivers/netapp/dataontap/test_nfs_cmode.py b/cinder/tests/unit/volume/drivers/netapp/dataontap/test_nfs_cmode.py
index a93d2ad27df..9e998068b2e 100644
--- a/cinder/tests/unit/volume/drivers/netapp/dataontap/test_nfs_cmode.py
+++ b/cinder/tests/unit/volume/drivers/netapp/dataontap/test_nfs_cmode.py
@@ -246,6 +246,7 @@ class NetAppCmodeNfsDriverTestCase(test.TestCase):
             'consistencygroup_support': True,
             'consistent_group_snapshot_enabled': True,
             'replication_enabled': False,
+            'online_extend_support': False,
         }]
 
         expected[0].update({'QoS_support': cluster_credentials})
diff --git a/cinder/volume/drivers/netapp/dataontap/nfs_cmode.py b/cinder/volume/drivers/netapp/dataontap/nfs_cmode.py
index 0163d5e4aba..deea4e0e855 100644
--- a/cinder/volume/drivers/netapp/dataontap/nfs_cmode.py
+++ b/cinder/volume/drivers/netapp/dataontap/nfs_cmode.py
@@ -274,6 +274,7 @@ class NetAppCmodeNfsDriver(nfs_base.NetAppNfsDriver,
             pool['consistencygroup_support'] = True
             pool['consistent_group_snapshot_enabled'] = True
             pool['multiattach'] = True
+            pool['online_extend_support'] = False
 
             # Add up-to-date capacity info
             nfs_share = ssc_vol_info['pool_name']
diff --git a/releasenotes/notes/bug-1765182-de132ba52167800b.yaml b/releasenotes/notes/bug-1765182-de132ba52167800b.yaml
new file mode 100644
index 00000000000..6c2d4723b8b
--- /dev/null
+++ b/releasenotes/notes/bug-1765182-de132ba52167800b.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    NetApp ONTAP (bug 1765182): Make ONTAP NetApp NFS driver report to the
+    Cinder scheduler that it doesn't support online volume extending.