diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index 3ff95d282..40ba529f6 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -103,6 +103,7 @@ public:
     status_t            writeStrongBinder(const sp<IBinder>& val);
     status_t            writeWeakBinder(const wp<IBinder>& val);
     status_t            write(const Flattenable& val);
+    status_t            writeByteArray(size_t len, const uint8_t *val);
 
     template<typename T>
     status_t            write(const LightFlattenable<T>& val);
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 8f7f7e76d..53b29a4ec 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -617,6 +617,17 @@ status_t Parcel::writeInt32(int32_t val)
     return writeAligned(val);
 }
 
+status_t Parcel::writeByteArray(size_t len, const uint8_t *val) {
+    if (!val) {
+        return writeAligned(-1);
+    }
+    status_t ret = writeAligned(len);
+    if (ret == NO_ERROR) {
+        ret = write(val, len * sizeof(*val));
+    }
+    return ret;
+}
+
 status_t Parcel::writeInt64(int64_t val)
 {
     return writeAligned(val);