diff --git a/src/models/janus/processing_janus.js b/src/models/janus/processing_janus.js
index 10d28f98d..434192e18 100644
--- a/src/models/janus/processing_janus.js
+++ b/src/models/janus/processing_janus.js
@@ -21,11 +21,17 @@ export class VLChatProcessor extends Processor {
     }
 
     /**
-     * @param {*} conversation 
-     * @param {Object} options
-     * @param {RawImage|RawImage[]} [options.images]
-     * @param {string} [options.chat_template="default"]
-     * @returns 
+     * @typedef {Object} MultimodalMessageProperties Additional properties for multimodal messages.
+     * @property {(RawImage | string | URL)[]} [images] The images in the message.
+     * @typedef {(import('../../tokenizers.js').Message & MultimodalMessageProperties)[]} MultimodalConversation The conversation possibly containing multimodal inputs.
+     */
+
+    /**
+     * @param {MultimodalConversation} conversation The chat messages to process.
+     * @param {Object} options Additional options for processing.
+     * @param {RawImage|RawImage[]} [options.images] The images to process, if not set in the conversation.
+     * @param {string} [options.chat_template="default"] The chat template to use.
+     * @returns {Promise<{input_ids: Tensor; attention_mask: Tensor; images_seq_mask: Tensor; images_emb_mask: Tensor;} & import('../../base/image_processors_utils.js').ImageProcessorResult>} The processed input.
      */
     async _call(conversation, {
         images = null,