diff --git a/openapi/machine-api.json b/openapi/machine-api.json
index 03f5f41f7..260927895 100644
--- a/openapi/machine-api.json
+++ b/openapi/machine-api.json
@@ -107,6 +107,13 @@
             },
             "type": "array"
           },
+          "loaded_filament_idx": {
+            "description": "The currently loaded filament index.",
+            "format": "uint",
+            "minimum": 0,
+            "nullable": true,
+            "type": "integer"
+          },
           "nozzle_diameter": {
             "description": "Diameter of the extrusion nozzle, in mm.",
             "format": "double",
@@ -285,6 +292,21 @@
               "type"
             ],
             "type": "object"
+          },
+          {
+            "description": "Unknown material",
+            "properties": {
+              "type": {
+                "enum": [
+                  "unknown"
+                ],
+                "type": "string"
+              }
+            },
+            "required": [
+              "type"
+            ],
+            "type": "object"
           }
         ]
       },
diff --git a/src/lib/machine-api.d.ts b/src/lib/machine-api.d.ts
index eb3ed6cc3..0fafa323a 100644
--- a/src/lib/machine-api.d.ts
+++ b/src/lib/machine-api.d.ts
@@ -138,6 +138,11 @@ export interface components {
     FdmHardwareConfiguration: {
       /** @description The filaments the printer has access to. */
       filaments: components['schemas']['Filament'][]
+      /**
+       * Format: uint
+       * @description The currently loaded filament index.
+       */
+      loaded_filament_idx?: number | null
       /**
        * Format: double
        * @description Diameter of the extrusion nozzle, in mm.
@@ -191,6 +196,10 @@ export interface components {
           /** @enum {string} */
           type: 'composite'
         }
+      | {
+          /** @enum {string} */
+          type: 'unknown'
+        }
     /** @description The hardware configuration of a machine. */
     HardwareConfiguration:
       | {