diff --git a/packages/sx.js/tsconfig.json b/packages/sx.js/tsconfig.json
index a0eac5ca1..3772ce613 100644
--- a/packages/sx.js/tsconfig.json
+++ b/packages/sx.js/tsconfig.json
@@ -5,6 +5,7 @@
     "module": "ESNext",
     "moduleResolution": "Node",
     "declaration": true,
+    "declarationMap": true,
     "outDir": "./dist"
   },
   "include": ["src/**/*"],