diff --git a/gns3server/controller/topology.py b/gns3server/controller/topology.py
index 84e6dba2..ab090d1d 100644
--- a/gns3server/controller/topology.py
+++ b/gns3server/controller/topology.py
@@ -227,6 +227,8 @@ def _convert_1_3_later(topo, topo_path):
             node["node_type"] = "virtualbox"
             if node["symbol"] is None:
                 node["symbol"] = ":/symbols/vbox_guest.svg"
+        elif old_node["type"] == "IOUDevice":
+            node["node_type"] = "iou"
         elif old_node["type"] == "Cloud":
             _create_cloud(node, old_node)
         else:
diff --git a/tests/topologies/1_5_iou/after/1_5_iou.gns3 b/tests/topologies/1_5_iou/after/1_5_iou.gns3
new file mode 100644
index 00000000..03971fde
--- /dev/null
+++ b/tests/topologies/1_5_iou/after/1_5_iou.gns3
@@ -0,0 +1,53 @@
+{
+    "auto_start": false,
+    "name": "1_5_iou",
+    "project_id": "8a077150-3e3e-4fed-944e-b8cd882e24db",
+    "revision": 5,
+    "topology": {
+        "computes": [
+            {
+                "compute_id": "ANYUUID",
+                "host": "127.0.0.1",
+                "name": "Remote 1",
+                "port": 3081,
+                "protocol": "http"
+            }
+        ],
+        "drawings": [],
+        "links": [],
+        "nodes": [
+            {
+                "compute_id": "ANYUUID",
+                "console": 6001,
+                "console_type": "telnet",
+                "label": {
+                    "rotation": 0,
+                    "style": "font-family: TypeWriter;font-size: 10;font-weight: bold;fill: #000000;fill-opacity: 1.0;",
+                    "text": "IOU1",
+                    "x": 16,
+                    "y": -25
+                },
+                "name": "IOU1",
+                "node_id": "aaeb2288-a7d8-42a9-b9d8-c42ab464a390",
+                "node_type": "iou",
+                "properties": {
+                    "ethernet_adapters": 2,
+                    "l1_keepalives": false,
+                    "md5sum": "4cfb52a3bff5fa3edf3df5694afce3de",
+                    "nvram": 128,
+                    "path": "i86bi-linux-l3-adventerprisek9-15.4.1T.bin",
+                    "ram": 256,
+                    "serial_adapters": 2,
+                    "startup_config": "startup-config.cfg",
+                    "use_default_iou_values": true
+                },
+                "symbol": ":/symbols/router.svg",
+                "x": -76,
+                "y": -48,
+                "z": 1
+            }
+        ]
+    },
+    "type": "topology",
+    "version": "2.0.0dev1"
+}
diff --git a/tests/topologies/1_5_iou/before/1_5_iou.gns3 b/tests/topologies/1_5_iou/before/1_5_iou.gns3
new file mode 100644
index 00000000..e4236bc2
--- /dev/null
+++ b/tests/topologies/1_5_iou/before/1_5_iou.gns3
@@ -0,0 +1,151 @@
+{
+    "auto_start": false,
+    "name": "1_5_iou",
+    "project_id": "8a077150-3e3e-4fed-944e-b8cd882e24db",
+    "revision": 4,
+    "topology": {
+        "nodes": [
+            {
+                "description": "IOU device",
+                "id": 1,
+                "label": {
+                    "color": "#ff000000",
+                    "font": "TypeWriter,10,-1,5,75,0,0,0,0,0",
+                    "text": "IOU1",
+                    "x": 16.2578125,
+                    "y": -25.0
+                },
+                "ports": [
+                    {
+                        "adapter_number": 0,
+                        "id": 1,
+                        "name": "Ethernet0/0",
+                        "port_number": 0
+                    },
+                    {
+                        "adapter_number": 0,
+                        "id": 2,
+                        "name": "Ethernet0/1",
+                        "port_number": 1
+                    },
+                    {
+                        "adapter_number": 0,
+                        "id": 3,
+                        "name": "Ethernet0/2",
+                        "port_number": 2
+                    },
+                    {
+                        "adapter_number": 0,
+                        "id": 4,
+                        "name": "Ethernet0/3",
+                        "port_number": 3
+                    },
+                    {
+                        "adapter_number": 1,
+                        "id": 5,
+                        "name": "Ethernet1/0",
+                        "port_number": 0
+                    },
+                    {
+                        "adapter_number": 1,
+                        "id": 6,
+                        "name": "Ethernet1/1",
+                        "port_number": 1
+                    },
+                    {
+                        "adapter_number": 1,
+                        "id": 7,
+                        "name": "Ethernet1/2",
+                        "port_number": 2
+                    },
+                    {
+                        "adapter_number": 1,
+                        "id": 8,
+                        "name": "Ethernet1/3",
+                        "port_number": 3
+                    },
+                    {
+                        "adapter_number": 2,
+                        "id": 9,
+                        "name": "Serial2/0",
+                        "port_number": 0
+                    },
+                    {
+                        "adapter_number": 2,
+                        "id": 10,
+                        "name": "Serial2/1",
+                        "port_number": 1
+                    },
+                    {
+                        "adapter_number": 2,
+                        "id": 11,
+                        "name": "Serial2/2",
+                        "port_number": 2
+                    },
+                    {
+                        "adapter_number": 2,
+                        "id": 12,
+                        "name": "Serial2/3",
+                        "port_number": 3
+                    },
+                    {
+                        "adapter_number": 3,
+                        "id": 13,
+                        "name": "Serial3/0",
+                        "port_number": 0
+                    },
+                    {
+                        "adapter_number": 3,
+                        "id": 14,
+                        "name": "Serial3/1",
+                        "port_number": 1
+                    },
+                    {
+                        "adapter_number": 3,
+                        "id": 15,
+                        "name": "Serial3/2",
+                        "port_number": 2
+                    },
+                    {
+                        "adapter_number": 3,
+                        "id": 16,
+                        "name": "Serial3/3",
+                        "port_number": 3
+                    }
+                ],
+                "properties": {
+                    "console": 6001,
+                    "ethernet_adapters": 2,
+                    "l1_keepalives": false,
+                    "md5sum": "4cfb52a3bff5fa3edf3df5694afce3de",
+                    "name": "IOU1",
+                    "nvram": 128,
+                    "path": "i86bi-linux-l3-adventerprisek9-15.4.1T.bin",
+                    "ram": 256,
+                    "serial_adapters": 2,
+                    "startup_config": "startup-config.cfg",
+                    "use_default_iou_values": true
+                },
+                "server_id": 1,
+                "symbol": ":/symbols/router.svg",
+                "type": "IOUDevice",
+                "vm_id": "aaeb2288-a7d8-42a9-b9d8-c42ab464a390",
+                "x": -76.0,
+                "y": -48.0
+            }
+        ],
+        "servers": [
+            {
+                "host": "127.0.0.1",
+                "id": 1,
+                "local": false,
+                "port": 3081,
+                "protocol": "http",
+                "user": "",
+                "vm": false
+            }
+        ]
+    },
+    "type": "topology",
+    "version": "1.5.1dev1"
+}