diff --git a/browser_tests/assets/old_workflow_converted_input.json b/browser_tests/assets/old_workflow_converted_input.json
new file mode 100644
index 000000000..8734433b1
--- /dev/null
+++ b/browser_tests/assets/old_workflow_converted_input.json
@@ -0,0 +1,128 @@
+{
+  "last_node_id": 2,
+  "last_link_id": 1,
+  "nodes": [
+    {
+      "id": 1,
+      "type": "ControlNetApplyAdvanced",
+      "pos": {
+        "0": 449,
+        "1": 204
+      },
+      "size": [
+        340.20001220703125,
+        166
+      ],
+      "flags": {},
+      "order": 1,
+      "mode": 0,
+      "inputs": [
+        {
+          "name": "positive",
+          "type": "CONDITIONING",
+          "link": null
+        },
+        {
+          "name": "negative",
+          "type": "CONDITIONING",
+          "link": null
+        },
+        {
+          "name": "control_net",
+          "type": "CONTROL_NET",
+          "link": null
+        },
+        {
+          "name": "image",
+          "type": "IMAGE",
+          "link": null
+        },
+        {
+          "name": "strength",
+          "type": "FLOAT",
+          "link": 1,
+          "widget": {
+            "name": "strength"
+          }
+        }
+      ],
+      "outputs": [
+        {
+          "name": "positive",
+          "type": "CONDITIONING",
+          "links": null
+        },
+        {
+          "name": "negative",
+          "type": "CONDITIONING",
+          "links": null
+        }
+      ],
+      "properties": {
+        "Node name for S&R": "ControlNetApplyAdvanced"
+      },
+      "widgets_values": [
+        1,
+        0,
+        1
+      ]
+    },
+    {
+      "id": 2,
+      "type": "PrimitiveNode",
+      "pos": {
+        "0": 177,
+        "1": 265
+      },
+      "size": [
+        210,
+        82
+      ],
+      "flags": {},
+      "order": 0,
+      "mode": 0,
+      "inputs": [],
+      "outputs": [
+        {
+          "name": "FLOAT",
+          "type": "FLOAT",
+          "links": [
+            1
+          ],
+          "widget": {
+            "name": "strength"
+          }
+        }
+      ],
+      "properties": {
+        "Run widget replace on values": false
+      },
+      "widgets_values": [
+        1,
+        "fixed"
+      ]
+    }
+  ],
+  "links": [
+    [
+      1,
+      2,
+      0,
+      1,
+      4,
+      "FLOAT"
+    ]
+  ],
+  "groups": [],
+  "config": {},
+  "extra": {
+    "ds": {
+      "scale": 1,
+      "offset": {
+        "0": 47.541666666666515,
+        "1": 186.9375
+      }
+    }
+  },
+  "version": 0.4
+}
\ No newline at end of file
diff --git a/browser_tests/nodeDisplay.spec.ts b/browser_tests/nodeDisplay.spec.ts
index bbbf98ae5..05d0157ce 100644
--- a/browser_tests/nodeDisplay.spec.ts
+++ b/browser_tests/nodeDisplay.spec.ts
@@ -32,4 +32,16 @@ test.describe('Optional input', () => {
     // If the node's multiline text widget is visible, then it was loaded successfully
     expect(comfyPage.page.locator('.comfy-multiline-input')).toHaveCount(1)
   })
+  test('Old workflow with converted input', async ({ comfyPage }) => {
+    await comfyPage.loadWorkflow('old_workflow_converted_input')
+    const node = await comfyPage.getNodeRefById('1')
+    const inputs = await node.getProperty('inputs')
+    const vaeInput = inputs.find((w) => w.name === 'vae')
+    const convertedInput = inputs.find((w) => w.name === 'strength')
+
+    expect(vaeInput).toBeDefined()
+    expect(convertedInput).toBeDefined()
+    expect(vaeInput.link).toBeNull()
+    expect(convertedInput.link).not.toBeNull()
+  })
 })
diff --git a/src/scripts/app.ts b/src/scripts/app.ts
index ff0fe446e..d1f250a10 100644
--- a/src/scripts/app.ts
+++ b/src/scripts/app.ts
@@ -38,7 +38,7 @@ import {
   SYSTEM_NODE_DEFS,
   useNodeDefStore
 } from '@/stores/nodeDefStore'
-import { Vector2 } from '@comfyorg/litegraph'
+import { INodeInputSlot, Vector2 } from '@comfyorg/litegraph'
 import _ from 'lodash'
 import {
   showExecutionErrorDialog,
@@ -2093,6 +2093,11 @@ export class ComfyApp {
           incoming: Record<string, any>
         ) => {
           const result = { ...incoming }
+          if (current.widget === undefined && incoming.widget !== undefined) {
+            // Field must be input as only inputs can be converted
+            this.inputs.push(current as INodeInputSlot)
+            return incoming
+          }
           for (const key of ['name', 'type', 'shape']) {
             if (current[key] !== undefined) {
               result[key] = current[key]