diff --git a/app/src/main/cpp/SensorsProtocol.cpp b/app/src/main/cpp/SensorsProtocol.cpp
index c8b6cdf9..708d11ad 100644
--- a/app/src/main/cpp/SensorsProtocol.cpp
+++ b/app/src/main/cpp/SensorsProtocol.cpp
@@ -3413,7 +3413,7 @@ int Gm_SetCameraSerialPortParam(int fd, unsigned int baud)
 	return ret;
 }
 
-int Gm_OpenCameraSerial(SIO_PARAM_SERIAL_DEF *pPortParam, char *serfile, unsigned int baud)
+int Gm_OpenCameraSerial(SIO_PARAM_SERIAL_DEF *pPortParam, const char *serfile, unsigned int baud)
 {
 	int	fd = -1;
 	char szbuf[512];
@@ -3653,7 +3653,7 @@ int GM_CameraSerialTimer(SIO_PARAM_SERIAL_DEF *pPortParam)
 
 #if 1
 // 启动使用串口拍照
-int GM_StartSerialCameraPhoto(int phototime, unsigned char channel, int cmdidx, unsigned char bImageSize, unsigned char presetno, char *serfile, unsigned int baud, int addr)
+int GM_StartSerialCameraPhoto(int phototime, unsigned char channel, int cmdidx, unsigned char bImageSize, unsigned char presetno, const char *serfile, unsigned int baud, int addr)
 {
 	int 	flag = 0;
 	char	szbuf[128], logbuf[128];