diff --git a/src/schemas/nodeDef/nodeDefSchemaV2.ts b/src/schemas/nodeDef/nodeDefSchemaV2.ts
index 4743164a1..1537eb81e 100644
--- a/src/schemas/nodeDef/nodeDefSchemaV2.ts
+++ b/src/schemas/nodeDef/nodeDefSchemaV2.ts
@@ -132,7 +132,7 @@ const zCustomInputSpec = zBaseInputOptions.extend({
   isOptional: z.boolean().optional()
 })
 
-const zInputSpec = z.union([
+export const zInputSpec = z.union([
   zIntInputSpec,
   zFloatInputSpec,
   zBooleanInputSpec,
diff --git a/src/services/litegraphService.ts b/src/services/litegraphService.ts
index 18d281973..1526ef490 100644
--- a/src/services/litegraphService.ts
+++ b/src/services/litegraphService.ts
@@ -36,6 +36,7 @@ import type { NodeId } from '@/platform/workflow/validation/schemas/workflowSche
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useDialogService } from '@/services/dialogService'
 import { transformInputSpecV2ToV1 } from '@/schemas/nodeDef/migration'
+import { zInputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
 import type {
   ComfyNodeDef as ComfyNodeDefV2,
   InputSpec,
@@ -465,6 +466,8 @@ export const useLitegraphService = () => {
               : output
           }
         )
+        const maybeDef = zInputSpec.safeParse(data.properties?.dynamicSpec).data
+        if (maybeDef) addNodeInput(this, maybeDef)
 
         data.widgets_values = migrateWidgetsValues(
           ComfyNode.nodeData.inputs,