diff --git a/cinder/tests/unit/volume/drivers/netapp/dataontap/test_block_cmode.py b/cinder/tests/unit/volume/drivers/netapp/dataontap/test_block_cmode.py
index b1f487c9992..b62ce499f1a 100644
--- a/cinder/tests/unit/volume/drivers/netapp/dataontap/test_block_cmode.py
+++ b/cinder/tests/unit/volume/drivers/netapp/dataontap/test_block_cmode.py
@@ -431,6 +431,7 @@ class NetAppBlockStorageCmodeLibraryTestCase(test.TestCase):
             'netapp_raid_type': 'raid_dp',
             'netapp_disk_type': 'SSD',
             'replication_enabled': False,
+            'online_extend_support': False,
         }]
 
         expected[0].update({'QoS_support': cluster_credentials})
diff --git a/cinder/volume/drivers/netapp/dataontap/block_cmode.py b/cinder/volume/drivers/netapp/dataontap/block_cmode.py
index 42c90201460..4d01e8fb632 100644
--- a/cinder/volume/drivers/netapp/dataontap/block_cmode.py
+++ b/cinder/volume/drivers/netapp/dataontap/block_cmode.py
@@ -296,6 +296,7 @@ class NetAppBlockStorageCmodeLibrary(block_base.NetAppBlockStorageLibrary,
             # Add driver capabilities and config info
             pool['QoS_support'] = self.using_cluster_credentials
             pool['multiattach'] = False
+            pool['online_extend_support'] = False
             pool['consistencygroup_support'] = True
             pool['consistent_group_snapshot_enabled'] = True
             pool['reserved_percentage'] = self.reserved_percentage
diff --git a/releasenotes/notes/bug-1765182-34fdc4bb8482f8a5.yaml b/releasenotes/notes/bug-1765182-34fdc4bb8482f8a5.yaml
new file mode 100644
index 00000000000..ade041f4e96
--- /dev/null
+++ b/releasenotes/notes/bug-1765182-34fdc4bb8482f8a5.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    NetApp ONTAP (bug 1765182): Make ONTAP NetApp iSCSI driver and FC driver
+    report to the Cinder scheduler that they don't support online volume
+    extending.