diff --git a/src/shared/api-schemas/openai.ts b/src/shared/api-schemas/openai.ts
index 663f771..6d267cb 100644
--- a/src/shared/api-schemas/openai.ts
+++ b/src/shared/api-schemas/openai.ts
@@ -83,7 +83,7 @@ export const OpenAIV1ChatCompletionSchema = z
   // Tool usage must be enabled via config because we currently have no way to
   // track quota usage for them or enforce limits.
   .omit(
-    Boolean(config.allowOpenAIToolUsage) ? {} : { tools: true, functions: true }
+    !Boolean(config.allowOpenAIToolUsage) ? { tools: true, functions: true } : {}
   )
   .strip();
 export type OpenAIChatMessage = z.infer<