diff --git a/cores/arduino/CMakeLists.txt b/cores/arduino/CMakeLists.txt
index e113d8de..b3b1af15 100644
--- a/cores/arduino/CMakeLists.txt
+++ b/cores/arduino/CMakeLists.txt
@@ -4,6 +4,7 @@ zephyr_include_directories(../../variants)
 
 if(NOT DEFINED ARDUINO_BUILD_PATH)
 
+zephyr_sources(zephyrPrint.cpp)
 zephyr_sources(zephyrSerial.cpp)
 zephyr_sources(zephyrCommon.cpp)
 zephyr_sources(main.cpp)
diff --git a/cores/arduino/zephyrPrint.cpp b/cores/arduino/zephyrPrint.cpp
new file mode 100644
index 00000000..979f5ce5
--- /dev/null
+++ b/cores/arduino/zephyrPrint.cpp
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2022 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <Arduino.h>
+
+/*
+ * This is the default implementation.
+ * It will be overridden by subclassese.
+ */
+size_t arduino::Print::write(const uint8_t *buffer, size_t size)
+{
+  size_t i;
+  for (i=0; i<size && write(buffer[i]); i++) {
+  }
+
+  return i;
+}