diff --git a/Libraries/JavaScriptAppEngine/Initialization/symbolicateStackTrace.js b/Libraries/JavaScriptAppEngine/Initialization/symbolicateStackTrace.js
index 122837dad3..9f68826cf5 100644
--- a/Libraries/JavaScriptAppEngine/Initialization/symbolicateStackTrace.js
+++ b/Libraries/JavaScriptAppEngine/Initialization/symbolicateStackTrace.js
@@ -13,6 +13,7 @@
 
 const {fetch} = require('fetch');
 const getDevServer = require('getDevServer');
+const {SourceCode} = require('NativeModules');
 
 import type {StackFrame} from 'parseErrorStack';
 
@@ -21,6 +22,19 @@ async function symbolicateStackTrace(stack: Array<StackFrame>): Promise<Array<St
   if (!devServer.bundleLoadedFromServer) {
     throw new Error('Bundle was not loaded from the packager');
   }
+  if (SourceCode.scriptURL) {
+    for (let i = 0; i < stack.length; ++i) {
+      // If the sources exist on disk rather than appearing to come from the packager,
+      // replace the location with the packager URL until we reach an internal source
+      // which does not have a path (no slashes), indicating a switch from within
+      // the application to a surrounding debugging environment.
+      if (/^http/.test(stack[i].file) || !/[\\/]/.test(stack[i].file)) {
+        break;
+      }
+      stack[i].file = SourceCode.scriptURL;
+    }
+  }
+
   const response = await fetch(devServer.url + 'symbolicate', {
     method: 'POST',
     body: JSON.stringify({stack}),