diff --git a/src/index.js b/src/index.js
index fb60fb2b..5aedd277 100644
--- a/src/index.js
+++ b/src/index.js
@@ -550,12 +550,13 @@ function createConfig(options, entry, format, writeMeta) {
 									...(options.generateTypes !== false && {
 										declarationDir: getDeclarationDir({ options, pkg }),
 									}),
-									jsx: 'preserve',
 									...(!options.jsxImportSource && {
+										jsx: 'preserve',
 										jsxFactory: options.jsx,
 										jsxFragmentFactory: options.jsxFragment,
 									}),
 									...(options.jsxImportSource && {
+										jsx: 'react-jsx',
 										jsxImportSource: options.jsxImportSource,
 									}),
 								},