diff --git a/packages/react-native/ReactAndroid/build.gradle.kts b/packages/react-native/ReactAndroid/build.gradle.kts
index 11759aae9580a0..4c3d5dcb052c94 100644
--- a/packages/react-native/ReactAndroid/build.gradle.kts
+++ b/packages/react-native/ReactAndroid/build.gradle.kts
@@ -117,8 +117,6 @@ val preparePrefab by
               PrefabPreprocessingEntry("jsi", Pair("../ReactCommon/jsi/", "")),
               PrefabPreprocessingEntry(
                   "fabricjni", Pair("src/main/jni/react/fabric", "react/fabric/")),
-              PrefabPreprocessingEntry(
-                  "mapbufferjni", Pair("src/main/jni/react/mapbuffer", "react/mapbuffer/")),
               PrefabPreprocessingEntry(
                   "react_render_mapbuffer",
                   Pair("../ReactCommon/react/renderer/mapbuffer/", "react/renderer/mapbuffer/")),
@@ -264,6 +262,8 @@ val preparePrefab by
                       Pair("../ReactCommon/react/renderer/imagemanager/platform/cxx/", ""),
                       // react_render_mapbuffer
                       Pair("../ReactCommon/react/renderer/mapbuffer/", "react/renderer/mapbuffer/"),
+                      // mapbufferjni
+                      Pair("src/main/jni/react/mapbuffer", "react/mapbuffer/"),
                       // react_utils
                       Pair("../ReactCommon/react/utils/", "react/utils/"),
                       // rrc_image
@@ -632,7 +632,6 @@ android {
             "rrc_root",
             "jsi",
             "fabricjni",
-            "mapbufferjni",
             "react_render_mapbuffer",
             "react_render_textlayoutmanager",
             "yoga",
@@ -748,7 +747,6 @@ android {
     create("rrc_root") { headers = File(prefabHeadersDir, "rrc_root").absolutePath }
     create("jsi") { headers = File(prefabHeadersDir, "jsi").absolutePath }
     create("fabricjni") { headers = File(prefabHeadersDir, "fabricjni").absolutePath }
-    create("mapbufferjni") { headers = File(prefabHeadersDir, "mapbufferjni").absolutePath }
     create("react_render_mapbuffer") {
       headers = File(prefabHeadersDir, "react_render_mapbuffer").absolutePath
     }
diff --git a/packages/react-native/ReactAndroid/cmake-utils/ReactNative-application.cmake b/packages/react-native/ReactAndroid/cmake-utils/ReactNative-application.cmake
index 87684b25c76f43..d86165cedfbfd8 100644
--- a/packages/react-native/ReactAndroid/cmake-utils/ReactNative-application.cmake
+++ b/packages/react-native/ReactAndroid/cmake-utils/ReactNative-application.cmake
@@ -66,7 +66,6 @@ target_compile_options(${CMAKE_PROJECT_NAME}
 find_package(ReactAndroid REQUIRED CONFIG)
 add_library(fabricjni ALIAS ReactAndroid::fabricjni)
 add_library(jsi ALIAS ReactAndroid::jsi)
-add_library(mapbufferjni ALIAS ReactAndroid::mapbufferjni)
 add_library(react_render_mapbuffer ALIAS ReactAndroid::react_render_mapbuffer)
 add_library(react_render_textlayoutmanager ALIAS ReactAndroid::react_render_textlayoutmanager)
 add_library(reactnative ALIAS ReactAndroid::reactnative)
@@ -78,7 +77,6 @@ add_library(fbjni ALIAS fbjni::fbjni)
 
 target_link_libraries(${CMAKE_PROJECT_NAME}
         fabricjni                           # prefab ready
-        mapbufferjni                        # prefab ready
         fbjni                               # via 3rd party prefab
         jsi                                 # prefab ready
         reactnative                         # prefab ready
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/common/mapbuffer/MapBufferSoLoader.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/common/mapbuffer/MapBufferSoLoader.kt
index 1c9536cc3fb0b0..a1e8af79239cc7 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/common/mapbuffer/MapBufferSoLoader.kt
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/common/mapbuffer/MapBufferSoLoader.kt
@@ -9,8 +9,8 @@ package com.facebook.react.common.mapbuffer
 
 import com.facebook.react.bridge.ReactMarker
 import com.facebook.react.bridge.ReactMarkerConstants
+import com.facebook.react.common.ReactNativeSoLoader
 import com.facebook.react.common.annotations.StableReactNativeAPI
-import com.facebook.soloader.SoLoader
 import com.facebook.systrace.Systrace
 
 @StableReactNativeAPI
@@ -28,7 +28,7 @@ public object MapBufferSoLoader {
         Systrace.TRACE_TAG_REACT_JAVA_BRIDGE,
         "ReadableMapBufferSoLoader.staticInit::load:mapbufferjni")
     ReactMarker.logMarker(ReactMarkerConstants.LOAD_REACT_NATIVE_MAPBUFFER_SO_FILE_START)
-    SoLoader.loadLibrary("mapbufferjni")
+    ReactNativeSoLoader.loadLibrary("mapbufferjni")
     ReactMarker.logMarker(ReactMarkerConstants.LOAD_REACT_NATIVE_MAPBUFFER_SO_FILE_END)
     Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE)
   }
diff --git a/packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt b/packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt
index 3ed2471f96b139..d5b8f5d4f325b1 100644
--- a/packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt
+++ b/packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt
@@ -299,6 +299,7 @@ add_executable(reactnative_unittest
   hermes-engine::libhermes
   hermes_inspector_modern
   jsi
+  mapbufferjni
   react_cxxreact
   react_codegen_rncore
   react_debug
diff --git a/packages/react-native/ReactAndroid/src/main/jni/OnLoad.cpp b/packages/react-native/ReactAndroid/src/main/jni/OnLoad.cpp
index 6b70cf2c50c73a..ec2c127ed88f7f 100644
--- a/packages/react-native/ReactAndroid/src/main/jni/OnLoad.cpp
+++ b/packages/react-native/ReactAndroid/src/main/jni/OnLoad.cpp
@@ -9,6 +9,8 @@
 #include <fbjni/fbjni.h>
 
 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void*) {
-  return facebook::jni::initialize(
-      vm, [] { facebook::react::OnLoad_react_newarchdefaults(); });
+  return facebook::jni::initialize(vm, [] {
+    facebook::react::OnLoad_mapbufferjni();
+    facebook::react::OnLoad_react_newarchdefaults();
+  });
 }
diff --git a/packages/react-native/ReactAndroid/src/main/jni/OnLoad.h b/packages/react-native/ReactAndroid/src/main/jni/OnLoad.h
index ff0ed0f72c67de..40c0c1c2c74d79 100644
--- a/packages/react-native/ReactAndroid/src/main/jni/OnLoad.h
+++ b/packages/react-native/ReactAndroid/src/main/jni/OnLoad.h
@@ -10,5 +10,6 @@
 namespace facebook {
 namespace react {
 JNIEXPORT void OnLoad_react_newarchdefaults();
-}
+JNIEXPORT void OnLoad_mapbufferjni();
+} // namespace react
 } // namespace facebook
diff --git a/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/CMakeLists.txt b/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/CMakeLists.txt
index 2694a9cd06783b..eb672c11734650 100644
--- a/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/CMakeLists.txt
+++ b/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/CMakeLists.txt
@@ -11,7 +11,7 @@ add_compile_options(-fexceptions -frtti -std=c++20 -Wall -DLOG_TAG=\"Fabric\")
 file(GLOB mapbuffer_SRC CONFIGURE_DEPENDS
         ${CMAKE_CURRENT_SOURCE_DIR}/react/common/mapbuffer/*.cpp)
 
-add_library(mapbufferjni SHARED ${mapbuffer_SRC})
+add_library(mapbufferjni OBJECT ${mapbuffer_SRC})
 
 target_include_directories(mapbufferjni
         PUBLIC
diff --git a/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/react/common/mapbuffer/OnLoad.cpp b/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/react/common/mapbuffer/OnLoad.cpp
index 3a1ec41a161c5e..99f278b3b8dd5f 100644
--- a/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/react/common/mapbuffer/OnLoad.cpp
+++ b/packages/react-native/ReactAndroid/src/main/jni/react/mapbuffer/react/common/mapbuffer/OnLoad.cpp
@@ -10,7 +10,17 @@
 #include "JReadableMapBuffer.h"
 #include "JWritableMapBuffer.h"
 
+namespace facebook {
+namespace react {
+JNIEXPORT void OnLoad_mapbufferjni() {
+  facebook::react::JReadableMapBuffer::registerNatives();
+}
+} // namespace react
+} // namespace facebook
+
+#ifndef REACT_NATIVE_OPEN_SOURCE
 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void*) {
   return facebook::jni::initialize(
-      vm, [] { facebook::react::JReadableMapBuffer::registerNatives(); });
+      vm, [] { facebook::react::OnLoad_mapbufferjni(); });
 }
+#endif