diff --git a/core/java/android/os/Binder.java b/core/java/android/os/Binder.java
index 8dcd93731aec0..635f58182b346 100644
--- a/core/java/android/os/Binder.java
+++ b/core/java/android/os/Binder.java
@@ -549,6 +549,16 @@ public class Binder implements IBinder {
     @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
     public final native void markVintfStability();
 
+    /**
+     * Use a VINTF-stability binder w/o VINTF requirements. Should be called
+     * on a binder before it is sent out of process.
+     *
+     * This must be called before the object is sent to another process.
+     *
+     * @hide
+     */
+    public final native void forceDowngradeToSystemStability();
+
     /**
      * Flush any Binder commands pending in the current thread to the kernel
      * driver.  This can be
diff --git a/core/jni/android_util_Binder.cpp b/core/jni/android_util_Binder.cpp
index 2e4be145d54d4..29f8ccf376548 100644
--- a/core/jni/android_util_Binder.cpp
+++ b/core/jni/android_util_Binder.cpp
@@ -487,9 +487,15 @@ public:
     }
 
     void markVintf() {
+        AutoMutex _l(mLock);
         mVintf = true;
     }
 
+    void forceDowngradeToSystemStability() {
+        AutoMutex _l(mLock);
+        mVintf = false;
+    }
+
     sp<IBinder> getExtension() {
         AutoMutex _l(mLock);
         sp<JavaBBinder> b = mBinder.promote();
@@ -1005,6 +1011,12 @@ static void android_os_Binder_markVintfStability(JNIEnv* env, jobject clazz) {
     jbh->markVintf();
 }
 
+static void android_os_Binder_forceDowngradeToSystemStability(JNIEnv* env, jobject clazz) {
+    JavaBBinderHolder* jbh =
+        (JavaBBinderHolder*) env->GetLongField(clazz, gBinderOffsets.mObject);
+    jbh->forceDowngradeToSystemStability();
+}
+
 static void android_os_Binder_flushPendingCommands(JNIEnv* env, jobject clazz)
 {
     IPCThreadState::self()->flushCommands();
@@ -1069,6 +1081,7 @@ static const JNINativeMethod gBinderMethods[] = {
     { "clearCallingWorkSource", "()J", (void*)android_os_Binder_clearCallingWorkSource },
     { "restoreCallingWorkSource", "(J)V", (void*)android_os_Binder_restoreCallingWorkSource },
     { "markVintfStability", "()V", (void*)android_os_Binder_markVintfStability},
+    { "forceDowngradeToSystemStability", "()V", (void*)android_os_Binder_forceDowngradeToSystemStability},
     { "flushPendingCommands", "()V", (void*)android_os_Binder_flushPendingCommands },
     { "getNativeBBinderHolder", "()J", (void*)android_os_Binder_getNativeBBinderHolder },
     { "getNativeFinalizer", "()J", (void*)android_os_Binder_getNativeFinalizer },