diff --git a/config/ol.json b/config/ol.json
index 5b09d266f6..c74879e641 100644
--- a/config/ol.json
+++ b/config/ol.json
@@ -61,6 +61,8 @@
     "compilation_level": "ADVANCED",
     "warning_level": "VERBOSE",
     "use_types_for_optimization": true,
-    "manage_closure_dependencies": true
+    "manage_closure_dependencies": true,
+    "create_source_map": "build/ol.js.map",
+    "source_map_format": "V3"
   }
 }