diff --git a/src/index.ts b/src/index.ts
index 74b0f56..3f5139b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,9 +2,9 @@ import mdx from '@mdx-js/mdx';
 import { createCompiler, MdxOptions } from './sb-mdx-plugin';
 
 export const compile = async (code: string, options?: MdxOptions) =>
-  mdx(code, { compilers: options?.skipCsf ? undefined : [createCompiler(options)] });
+  mdx(code, { compilers: options?.skipCsf ? [] : [createCompiler(options)] });
 
 export const compileSync = (code: string, options?: MdxOptions) =>
-  mdx.sync(code, { compilers: options?.skipCsf ? undefined : [createCompiler(options)] });
+  mdx.sync(code, { compilers: options?.skipCsf ? [] : [createCompiler(options)] });
 
 export * from './sb-mdx-plugin';