diff --git a/React/React.xcodeproj/project.pbxproj b/React/React.xcodeproj/project.pbxproj
index 5232e06f72a..8c89419471d 100644
--- a/React/React.xcodeproj/project.pbxproj
+++ b/React/React.xcodeproj/project.pbxproj
@@ -1215,6 +1215,7 @@
 		CF2731C11E7B8DE40044CA4F /* RCTDeviceInfo.m in Sources */ = {isa = PBXBuildFile; fileRef = CF2731BF1E7B8DE40044CA4F /* RCTDeviceInfo.m */; };
 		CF2731C21E7B8DEF0044CA4F /* RCTDeviceInfo.h in Headers */ = {isa = PBXBuildFile; fileRef = CF2731BE1E7B8DE40044CA4F /* RCTDeviceInfo.h */; };
 		CF2731C31E7B8DF30044CA4F /* RCTDeviceInfo.m in Sources */ = {isa = PBXBuildFile; fileRef = CF2731BF1E7B8DE40044CA4F /* RCTDeviceInfo.m */; };
+		E223624420875A8000108244 /* JSExecutor.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E223624320875A8000108244 /* JSExecutor.cpp */; };
 		E9B20B7B1B500126007A2DA7 /* RCTAccessibilityManager.m in Sources */ = {isa = PBXBuildFile; fileRef = E9B20B7A1B500126007A2DA7 /* RCTAccessibilityManager.m */; };
 		EBF21BBC1FC498270052F4D5 /* InspectorInterfaces.h in Headers */ = {isa = PBXBuildFile; fileRef = EBF21BBA1FC498270052F4D5 /* InspectorInterfaces.h */; };
 		EBF21BBD1FC498270052F4D5 /* InspectorInterfaces.cpp in Sources */ = {isa = PBXBuildFile; fileRef = EBF21BBB1FC498270052F4D5 /* InspectorInterfaces.cpp */; };
@@ -2305,6 +2306,7 @@
 		C6D380191F71D75B00621378 /* RAMBundleRegistry.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = RAMBundleRegistry.cpp; sourceTree = "<group>"; };
 		CF2731BE1E7B8DE40044CA4F /* RCTDeviceInfo.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTDeviceInfo.h; sourceTree = "<group>"; };
 		CF2731BF1E7B8DE40044CA4F /* RCTDeviceInfo.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTDeviceInfo.m; sourceTree = "<group>"; };
+		E223624320875A8000108244 /* JSExecutor.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSExecutor.cpp; sourceTree = "<group>"; };
 		E3BBC8EB1ADE6F47001BBD81 /* RCTTextDecorationLineType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = RCTTextDecorationLineType.h; sourceTree = "<group>"; };
 		E9B20B791B500126007A2DA7 /* RCTAccessibilityManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTAccessibilityManager.h; sourceTree = "<group>"; };
 		E9B20B7A1B500126007A2DA7 /* RCTAccessibilityManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTAccessibilityManager.m; sourceTree = "<group>"; };
@@ -3034,6 +3036,7 @@
 		AC70D2EA1DE489FC002E6351 /* cxxreact */ = {
 			isa = PBXGroup;
 			children = (
+				E223624320875A8000108244 /* JSExecutor.cpp */,
 				3D92B0A71E03699D0018521A /* CxxModule.h */,
 				3D92B0A81E03699D0018521A /* CxxNativeModule.cpp */,
 				3D92B0A91E03699D0018521A /* CxxNativeModule.h */,
@@ -4440,6 +4443,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				13134C9A1E296B2A00B9F3CB /* RCTCxxMethod.mm in Sources */,
+				E223624420875A8000108244 /* JSExecutor.cpp in Sources */,
 				59500D451F71C63F00B122B7 /* RCTUIManagerUtils.m in Sources */,
 				597633361F4E021D005BE8A4 /* RCTShadowView+Internal.m in Sources */,
 				13723B501A82FD3C00F88898 /* RCTStatusBarManager.m in Sources */,
diff --git a/ReactCommon/cxxreact/Android.mk b/ReactCommon/cxxreact/Android.mk
index 56ffdb1b3c5..1c22c761e6e 100644
--- a/ReactCommon/cxxreact/Android.mk
+++ b/ReactCommon/cxxreact/Android.mk
@@ -17,6 +17,7 @@ LOCAL_SRC_FILES := \
   JSCSamplingProfiler.cpp \
   JSCTracing.cpp \
   JSCUtils.cpp \
+	JSExecutor.cpp \
   JSIndexedRAMBundle.cpp \
   MethodCall.cpp \
   ModuleRegistry.cpp \
diff --git a/ReactCommon/cxxreact/BUCK b/ReactCommon/cxxreact/BUCK
index 8bf767e8289..14aa2e3c999 100644
--- a/ReactCommon/cxxreact/BUCK
+++ b/ReactCommon/cxxreact/BUCK
@@ -89,6 +89,7 @@ CXXREACT_PUBLIC_HEADERS = [
     "JSExecutor.h",
     "JSCExecutor.h",
     "JSCNativeModules.h",
+    "JSCUtils.h",
     "JSIndexedRAMBundle.h",
     "JSModulesUnbundle.h",
     "MessageQueueThread.h",
diff --git a/ReactCommon/cxxreact/JSCExecutor.cpp b/ReactCommon/cxxreact/JSCExecutor.cpp
index a7d8c72cbf7..01a68fb4d5a 100644
--- a/ReactCommon/cxxreact/JSCExecutor.cpp
+++ b/ReactCommon/cxxreact/JSCExecutor.cpp
@@ -458,13 +458,16 @@ namespace facebook {
       m_bundleRegistry = std::move(bundleRegistry);
     }
 
-    void JSCExecutor::registerBundle(uint32_t bundleId, const std::string& bundlePath) {
+    void JSCExecutor::registerBundle(
+        uint32_t bundleId,
+        const std::string& bundlePath) {
       if (m_bundleRegistry) {
         m_bundleRegistry->registerBundle(bundleId, bundlePath);
       } else {
-        auto sourceUrl = String(m_context, bundlePath.c_str());
+        auto stPath = JSCExecutor::getSyntheticBundlePath(bundleId, bundlePath);
+        auto sourceUrlStr = String(m_context, stPath.c_str());
         auto source = adoptString(JSBigFileString::fromPath(bundlePath));
-        evaluateScript(m_context, source, sourceUrl);
+        evaluateScript(m_context, source, sourceUrlStr);
       }
     }
 
diff --git a/ReactCommon/cxxreact/JSCUtils.cpp b/ReactCommon/cxxreact/JSCUtils.cpp
index 8681faa443f..45cc591bf76 100644
--- a/ReactCommon/cxxreact/JSCUtils.cpp
+++ b/ReactCommon/cxxreact/JSCUtils.cpp
@@ -2,6 +2,8 @@
 
 #include "JSCUtils.h"
 
+#include "RAMBundleRegistry.h"
+
 #include <folly/Conv.h>
 
 namespace facebook {
diff --git a/ReactCommon/cxxreact/JSExecutor.cpp b/ReactCommon/cxxreact/JSExecutor.cpp
new file mode 100644
index 00000000000..9548f9664ac
--- /dev/null
+++ b/ReactCommon/cxxreact/JSExecutor.cpp
@@ -0,0 +1,22 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#include "JSExecutor.h"
+
+#include "RAMBundleRegistry.h"
+
+#include <folly/Conv.h>
+
+namespace facebook {
+namespace react {
+
+std::string JSExecutor::getSyntheticBundlePath(
+    uint32_t bundleId,
+    const std::string& bundlePath) {
+  if (bundleId == RAMBundleRegistry::MAIN_BUNDLE_ID) {
+    return bundlePath;
+  }
+  return folly::to<std::string>("seg-", bundleId, ".js");
+}
+
+}
+}
diff --git a/ReactCommon/cxxreact/JSExecutor.h b/ReactCommon/cxxreact/JSExecutor.h
index 85b4bfcb036..35338cd0876 100644
--- a/ReactCommon/cxxreact/JSExecutor.h
+++ b/ReactCommon/cxxreact/JSExecutor.h
@@ -101,6 +101,10 @@ public:
 
   virtual void destroy() {}
   virtual ~JSExecutor() {}
+
+  static std::string getSyntheticBundlePath(
+      uint32_t bundleId,
+      const std::string& bundlePath);
 };
 
 } }