diff --git a/build/build-cdt-lib.js b/build/build-cdt-lib.js
index 378508c5e32e..1fd274f8bf29 100644
--- a/build/build-cdt-lib.js
+++ b/build/build-cdt-lib.js
@@ -57,6 +57,8 @@ for (const file of glob.sync(`${outDir}/**/*.js`)) {
     if (file.endsWith('SourceMap.js')) {
       if (line.includes('TextSourceMap.load =')) deletionMode = true;
       if (line.includes('prototype.sourceContentProvider =')) deletionMode = true;
+      if (line.includes(`url += Common.UIString('? [sm]');`)) newLine = '';
+      // newLine = line.replace(`Common.ParsedURL.completeURL(this._baseURL, href)`, `''`);
     }
     newLine = newLine.replace('exports["default"]', 'exports.default');
     if (deletionMode) {
diff --git a/lighthouse-core/lib/cdt/generated/sdk/SourceMap.js b/lighthouse-core/lib/cdt/generated/sdk/SourceMap.js
index fc2ef798f09f..f9ae774db00d 100644
--- a/lighthouse-core/lib/cdt/generated/sdk/SourceMap.js
+++ b/lighthouse-core/lib/cdt/generated/sdk/SourceMap.js
@@ -371,7 +371,6 @@ var TextSourceMap = /** @class */ (function () {
             var url = Common.ParsedURL.completeURL(this._baseURL, href) || href;
             var source = sourceMap.sourcesContent && sourceMap.sourcesContent[i];
             if (url === this._compiledURL && source) {
-                url += Common.UIString('? [sm]');
             }
             this._sourceInfos.set(url, new TextSourceMap.SourceInfo(source, null));
             sourcesList.push(url);