diff --git a/src/index.js b/src/index.js
index 7cc27ab..0ebb2d5 100644
--- a/src/index.js
+++ b/src/index.js
@@ -122,7 +122,7 @@ function format(options) {
   if ([".ts", ".tsx"].includes(fileExtension)) {
     // XXX: It seems babylon is getting a TypeScript plugin.
     // Should that be used instead?
-    formattingOptions.eslint.parser = require.resolve(
+    formattingOptions.eslint.parser = formattingOptions.eslint.parser || require.resolve(
       "typescript-eslint-parser"
     );
   }