diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index ed2e7df..ce630bd 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -105,6 +105,7 @@
     status_t            writeStrongBinder(const sp<IBinder>& val);
     status_t            writeWeakBinder(const wp<IBinder>& val);
     status_t            writeInt32Array(size_t len, const int32_t *val);
+    status_t            writeByteArray(size_t len, const uint8_t *val);
 
     template<typename T>
     status_t            write(const Flattenable<T>& val);
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 159003d..296cd5c 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -631,6 +631,16 @@
     }
     return ret;
 }
+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)
 {