diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2d1e5c20..7772f798f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ensure explicitly referenced `@source` directories are scanned even when ignored by git ([#20214](https://github.com/tailwindlabs/tailwindcss/pull/20214))
 - Ensure `@source` globs ending in `**/*` preserve dynamic path segments to avoid scanning too many files ([#20217](https://github.com/tailwindlabs/tailwindcss/pull/20217))
 - Canonicalization: don't fold `calc(…)` divisions when the result would require high precision (e.g. `w-[calc(100%/3.5)]` → `w-[calc(100%/3.5)]`, not `w-[28.571428571428573%]`) ([#20221](https://github.com/tailwindlabs/tailwindcss/pull/20221))
+- Serve ESM type declarations to ESM importers of `@tailwindcss/postcss` ([#20228](https://github.com/tailwindlabs/tailwindcss/pull/20228))
 
 ### Changed
 
diff --git a/packages/@tailwindcss-postcss/package.json b/packages/@tailwindcss-postcss/package.json
index bf14243d3..25d01d576 100644
--- a/packages/@tailwindcss-postcss/package.json
+++ b/packages/@tailwindcss-postcss/package.json
@@ -24,9 +24,14 @@
   },
   "exports": {
     ".": {
-      "types": "./dist/index.d.ts",
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
+      "import": {
+        "types": "./dist/index.d.mts",
+        "default": "./dist/index.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/index.js"
+      }
     }
   },
   "dependencies": {