diff --git a/serialport/src/main/cpp/gen_SerialPort_h.sh b/serialport/src/main/cpp/gen_SerialPort_h.sh
index e063e38..3898475 100644
--- a/serialport/src/main/cpp/gen_SerialPort_h.sh
+++ b/serialport/src/main/cpp/gen_SerialPort_h.sh
@@ -1,2 +1,3 @@
-IyEvYmluL3NoCmphdmFoIC1vIFNlcmlhbFBvcnQuaCAtam5pIC1jbGFzc3BhdGggLi4vamF2YSBh
-bmRyb2lkLnNlcmlhbHBvcnQuU2VyaWFsUG9ydAoK
\ No newline at end of file
+#!/bin/sh
+javah -o SerialPort.h -jni -classpath ../java android.serialport.SerialPort
+