diff --git a/src/utils.js b/src/utils.js
index 9912b9a9..529652cd 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -691,7 +691,7 @@ function getModernWebpackImporter(loaderContext, implementation, loadPaths) {
           });
         });
 
-        return { contents, syntax };
+        return { contents, syntax, sourceMapUrl: canonicalUrl };
       } catch (err) {
         return null;
       }