diff --git a/gns3server/controller/project.py b/gns3server/controller/project.py
index 34ace5ff..0c0093ab 100644
--- a/gns3server/controller/project.py
+++ b/gns3server/controller/project.py
@@ -567,6 +567,8 @@ class Project:
     @open_required
     async def delete_node(self, node_id):
         node = self.get_node(node_id)
+        if node.locked:
+            raise aiohttp.web.HTTPConflict(text="Node {} cannot be deleted because it is locked".format(node.name))
         await self.__delete_node_links(node)
         self.remove_allocated_node_name(node.name)
         del self._nodes[node.id]
diff --git a/gns3server/handlers/api/controller/node_handler.py b/gns3server/handlers/api/controller/node_handler.py
index fbd4a41c..db3ae4a6 100644
--- a/gns3server/handlers/api/controller/node_handler.py
+++ b/gns3server/handlers/api/controller/node_handler.py
@@ -189,7 +189,8 @@ class NodeHandler:
         status_codes={
             204: "Instance deleted",
             400: "Invalid request",
-            404: "Instance doesn't exist"
+            404: "Instance doesn't exist",
+            409: "Cannot delete locked node"
         },
         description="Delete a node instance")
     async def delete(request, response):
diff --git a/tests/controller/test_project.py b/tests/controller/test_project.py
index ac4f7256..5fcee71e 100644
--- a/tests/controller/test_project.py
+++ b/tests/controller/test_project.py
@@ -257,6 +257,25 @@ def test_delete_node(async_run, controller):
     project.emit_notification.assert_any_call("node.deleted", node.__json__())
 
 
+def test_delete_locked_node(async_run, controller):
+    """
+    For a local server we send the project path
+    """
+    compute = MagicMock()
+    project = Project(controller=controller, name="Test")
+    project.emit_notification = MagicMock()
+
+    response = MagicMock()
+    response.json = {"console": 2048}
+    compute.post = AsyncioMagicMock(return_value=response)
+
+    node = async_run(project.add_node(compute, "test", None, node_type="vpcs", properties={"startup_config": "test.cfg"}))
+    assert node.id in project._nodes
+    node.locked = True
+    with pytest.raises(aiohttp.web_exceptions.HTTPConflict):
+        async_run(project.delete_node(node.id))
+
+
 def test_delete_node_delete_link(async_run, controller):
     """
     Delete a node delete all the node connected