diff --git a/src/createRollupConfig.ts b/src/createRollupConfig.ts
index 0092baf28..40a529099 100644
--- a/src/createRollupConfig.ts
+++ b/src/createRollupConfig.ts
@@ -108,6 +108,8 @@ export async function createRollupConfig(
           'main',
           opts.target !== 'node' ? 'browser' : undefined,
         ].filter(Boolean) as string[],
+        // defaults + .jsx
+        extensions: ['.mjs', '.js', '.jsx', '.json', '.node'],
       }),
       opts.format === 'umd' &&
         commonjs({
diff --git a/test/fixtures/build-default/src/index.ts b/test/fixtures/build-default/src/index.ts
index 1716e60ed..1a2adf25d 100644
--- a/test/fixtures/build-default/src/index.ts
+++ b/test/fixtures/build-default/src/index.ts
@@ -1,6 +1,8 @@
 import './syntax/nullish-coalescing';
 import './syntax/optional-chaining';
 
+import './syntax/jsx-import/JSX-import-JSX';
+
 export { foo } from './foo';
 
 export const sum = (a: number, b: number) => {
diff --git a/test/fixtures/build-default/src/syntax/jsx-import/JSX-A.jsx b/test/fixtures/build-default/src/syntax/jsx-import/JSX-A.jsx
new file mode 100644
index 000000000..27f439c05
--- /dev/null
+++ b/test/fixtures/build-default/src/syntax/jsx-import/JSX-A.jsx
@@ -0,0 +1,7 @@
+// DO NOT IMPORT THIS FILE DIRECTLY FROM index.ts
+// THIS FILE IS INTENTIONALLY TO TEST JSX CHAINING IMPORT
+// SEE https://github.com/jaredpalmer/tsdx/issues/523
+
+import JSXB from './JSX-B';
+
+export default JSXB;
diff --git a/test/fixtures/build-default/src/syntax/jsx-import/JSX-B.jsx b/test/fixtures/build-default/src/syntax/jsx-import/JSX-B.jsx
new file mode 100644
index 000000000..5d51e4235
--- /dev/null
+++ b/test/fixtures/build-default/src/syntax/jsx-import/JSX-B.jsx
@@ -0,0 +1,7 @@
+// DO NOT IMPORT THIS FILE DIRECTLY FROM index.ts
+// THIS FILE IS INTENTIONALLY TO TEST JSX CHAINING IMPORT
+// SEE https://github.com/jaredpalmer/tsdx/issues/523
+
+export default function JSXComponent() {
+  return 'JSXC';
+}
diff --git a/test/fixtures/build-default/src/syntax/jsx-import/JSX-import-JSX.jsx b/test/fixtures/build-default/src/syntax/jsx-import/JSX-import-JSX.jsx
new file mode 100644
index 000000000..18d99216c
--- /dev/null
+++ b/test/fixtures/build-default/src/syntax/jsx-import/JSX-import-JSX.jsx
@@ -0,0 +1,4 @@
+// Testing for jsx chaining import
+// https://github.com/jaredpalmer/tsdx/issues/523
+
+export * from './JSX-A';