diff --git a/serialport/src/main/cpp/SerialPort.h b/serialport/src/main/cpp/SerialPort.h
index 0a490b2..bed2cc7 100644
--- a/serialport/src/main/cpp/SerialPort.h
+++ b/serialport/src/main/cpp/SerialPort.h
@@ -1,18 +1,40 @@
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\ No newline at end of file
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class android_serialport_SerialPort */
+
+#ifndef _Included_android_serialport_SerialPort
+#define _Included_android_serialport_SerialPort
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     android_serialport_SerialPort
+ * Method:    open
+ * Signature: (Ljava/lang/String;IIIII)Ljava/io/FileDescriptor;
+ */
+JNIEXPORT jobject JNICALL Java_android_serialport_SerialPort_open
+  (JNIEnv *, jobject, jstring, jint, jint, jint, jint, jint);
+
+/*
+ * Class:     android_serialport_SerialPort
+ * Method:    close
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_android_serialport_SerialPort_close
+  (JNIEnv *, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
+/* Header for class android_serialport_SerialPort_Builder */
+
+#ifndef _Included_android_serialport_SerialPort_Builder
+#define _Included_android_serialport_SerialPort_Builder
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifdef __cplusplus
+}
+#endif
+#endif