diff --git a/React/CxxBridge/RCTCxxBridge.mm b/React/CxxBridge/RCTCxxBridge.mm
index 4efb27593..a499a8968 100644
--- a/React/CxxBridge/RCTCxxBridge.mm
+++ b/React/CxxBridge/RCTCxxBridge.mm
@@ -1190,8 +1190,7 @@ RCT_NOT_IMPLEMENTED(- (instancetype)initWithBundleURL:(__unused NSURL *)bundleUR
       [self->_performanceLogger markStopForTag:RCTPLRAMBundleLoad];
       [self->_performanceLogger setValue:scriptStr->size() forTag:RCTPLRAMStartupCodeSize];
       if (self->_reactInstance) {
-        std::string baseDirectoryPath = sourceUrlStr.stringByDeletingLastPathComponent.UTF8String;
-        auto registry = std::make_unique<JSIndexedRAMBundleRegistry>(std::move(ramBundle), baseDirectoryPath);
+        auto registry = std::make_unique<JSIndexedRAMBundleRegistry>(std::move(ramBundle), sourceUrlStr.UTF8String);
         self->_reactInstance->loadRAMBundle(std::move(registry), std::move(scriptStr),
                                             sourceUrlStr.UTF8String, !async);
       }
diff --git a/ReactAndroid/src/main/jni/react/jni/JniRAMBundleRegistry.cpp b/ReactAndroid/src/main/jni/react/jni/JniRAMBundleRegistry.cpp
index 17f38a81c..01c907d43 100644
--- a/ReactAndroid/src/main/jni/react/jni/JniRAMBundleRegistry.cpp
+++ b/ReactAndroid/src/main/jni/react/jni/JniRAMBundleRegistry.cpp
@@ -2,8 +2,6 @@
 
 #include "JniRAMBundleRegistry.h"
 
-#include <libgen.h>
-
 #include <folly/Conv.h>
 #include <folly/Memory.h>
 
@@ -12,16 +10,6 @@
 namespace facebook {
 namespace react {
 
-static std::string jsBundlesDir(const std::string& entryFile) {
-  std::string dir = dirname(entryFile.c_str());
-  std::string entryName = basename(entryFile.c_str());
-  entryName.erase(entryName.find("."), std::string::npos);
-
-  std::string path = "js-bundles/" + entryName + "/";
-  // android's asset manager does not work with paths that start with a dot
-  return dir == "." ? path : dir + "/" + path;
-}
-
 JniRAMBundleRegistry::JniRAMBundleRegistry(std::unique_ptr<JSModulesUnbundle> mainBundle, AAssetManager *assetManager, const std::string& entryFile) :
   RAMBundleRegistry(std::move(mainBundle)),
   m_assetManager(assetManager),
diff --git a/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.cpp b/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.cpp
index 92d1fdbfb..2e678802a 100644
--- a/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.cpp
+++ b/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.cpp
@@ -10,12 +10,12 @@
 namespace facebook {
 namespace react {
 
-std::unique_ptr<JSModulesUnbundle> JSIndexedRAMBundleRegistry::bundleById(uint32_t index) const {
-  return folly::make_unique<JSIndexedRAMBundle>(bundlePathById(index).c_str());
-}
+JSIndexedRAMBundleRegistry::JSIndexedRAMBundleRegistry(std::unique_ptr<JSModulesUnbundle> mainBundle, const std::string& entryFile):
+    RAMBundleRegistry(std::move(mainBundle)), m_baseDirectoryPath(jsBundlesDir(entryFile)) {}
 
-std::string JSIndexedRAMBundleRegistry::bundlePathById(uint32_t index) const {
-  return m_baseDirectoryPath + "/js-bundles/" + toString(index) + ".jsbundle";
+std::unique_ptr<JSModulesUnbundle> JSIndexedRAMBundleRegistry::bundleById(uint32_t index) const {
+  std::string bundlePathById = m_baseDirectoryPath + toString(index) + ".jsbundle";
+  return folly::make_unique<JSIndexedRAMBundle>(bundlePathById.c_str());
 }
 
 }  // namespace react
diff --git a/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.h b/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.h
index db3a189e8..8dd213a21 100644
--- a/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.h
+++ b/ReactCommon/cxxreact/JSIndexedRAMBundleRegistry.h
@@ -13,16 +13,11 @@ namespace react {
 
 class RN_EXPORT JSIndexedRAMBundleRegistry: public RAMBundleRegistry {
 public:
-  JSIndexedRAMBundleRegistry(
-    std::unique_ptr<JSModulesUnbundle> mainBundle,
-    std::string baseDirectoryPath):
-  RAMBundleRegistry(std::move(mainBundle)), m_baseDirectoryPath(baseDirectoryPath) {}
+  JSIndexedRAMBundleRegistry(std::unique_ptr<JSModulesUnbundle> mainBundle, const std::string& entryFile);
 
 protected:
   virtual std::unique_ptr<JSModulesUnbundle> bundleById(uint32_t index) const override;
 private:
-  std::string bundlePathById(uint32_t index) const;
-
   std::string m_baseDirectoryPath;
 };
 
diff --git a/ReactCommon/cxxreact/RAMBundleRegistry.cpp b/ReactCommon/cxxreact/RAMBundleRegistry.cpp
index f291f71f1..6b88a155a 100644
--- a/ReactCommon/cxxreact/RAMBundleRegistry.cpp
+++ b/ReactCommon/cxxreact/RAMBundleRegistry.cpp
@@ -2,6 +2,8 @@
 
 #include "RAMBundleRegistry.h"
 
+#include <libgen.h>
+
 namespace facebook {
 namespace react {
 
@@ -23,5 +25,20 @@ JSModulesUnbundle *RAMBundleRegistry::getBundle(uint32_t bundleId) const {
   return m_bundles.at(bundleId).get();
 }
 
+std::string RAMBundleRegistry::jsBundlesDir(std::string entryFile) {
+  char *pEntryFile = const_cast<char *>(entryFile.c_str());
+  std::string dir = dirname(pEntryFile);
+  std::string entryName = basename(pEntryFile);
+
+  std::size_t dotPosition = entryName.find(".");
+  if (dotPosition != std::string::npos) {
+    entryName.erase(dotPosition, std::string::npos);
+  }
+
+  std::string path = "js-bundles/" + entryName + "/";
+  // android's asset manager does not work with paths that start with a dot
+  return dir == "." ? path : dir + "/" + path;
+}
+
 }  // namespace react
 }  // namespace facebook
diff --git a/ReactCommon/cxxreact/RAMBundleRegistry.h b/ReactCommon/cxxreact/RAMBundleRegistry.h
index 950379b83..d146be447 100644
--- a/ReactCommon/cxxreact/RAMBundleRegistry.h
+++ b/ReactCommon/cxxreact/RAMBundleRegistry.h
@@ -28,6 +28,7 @@ public:
   JSModulesUnbundle::Module getModule(uint32_t bundleId, uint32_t moduleId);
   virtual ~RAMBundleRegistry() {};
 protected:
+  std::string jsBundlesDir(std::string entryFile);
   virtual std::unique_ptr<JSModulesUnbundle> bundleById(uint32_t index) const {
     throw std::runtime_error("Please, override this method in a subclass to support multiple RAM bundles.");
   }