diff --git a/src/vs/workbench/contrib/void/common/modelCapabilities.ts b/src/vs/workbench/contrib/void/common/modelCapabilities.ts
index 6048f143..8e338d07 100644
--- a/src/vs/workbench/contrib/void/common/modelCapabilities.ts
+++ b/src/vs/workbench/contrib/void/common/modelCapabilities.ts
@@ -153,6 +153,8 @@ export type VoidStaticModelInfo = { // not stateful
 	specialToolFormat?: 'openai-style' | 'anthropic-style' | 'gemini-style', // typically you should use 'openai-style'. null means "can't call tools by default", and asks the LLM to output XML in agent mode
 	supportsFIM: boolean; // whether the model was specifically designed for autocomplete or "FIM" ("fill-in-middle" format)
 
+	additionalOpenAIPayload?: { [key: string]: string } // additional payload in the message body for requests that are openai-compatible (ollama, vllm, openai, openrouter, etc)
+
 	// reasoning options
 	reasoningCapabilities: false | {
 		readonly supportsReasoning: true; // for clarity, this must be true if anything below is specified