diff --git a/app/src/main/cpp/SensorsProtocol.cpp b/app/src/main/cpp/SensorsProtocol.cpp
index 4802f3de..72eb9e52 100644
--- a/app/src/main/cpp/SensorsProtocol.cpp
+++ b/app/src/main/cpp/SensorsProtocol.cpp
@@ -1077,7 +1077,7 @@ void Gm_InitSerialComm(SENSOR_PARAM *sensorParam, char *filedir)
     if(NULL == filedir)
         return;
     memset(srdt.filedir, 0, sizeof(srdt.filedir));
-    memmove(srdt.filedir, filedir, min(sizeof(srdt.filedir), strlen(filedir)));
+    memmove(srdt.filedir, filedir, MIN(sizeof(srdt.filedir), strlen(filedir)));
     FindDevUseSerialCommNo();
 #if 0
     //Collect_sensor_data();
diff --git a/app/src/main/cpp/SensorsProtocol.h b/app/src/main/cpp/SensorsProtocol.h
index 3b40e8bb..525bac7e 100644
--- a/app/src/main/cpp/SensorsProtocol.h
+++ b/app/src/main/cpp/SensorsProtocol.h
@@ -34,7 +34,7 @@ typedef long long LONG;
 #define LOWORD(l)       ((WORD)(l))
 #define HIWORD(l)       ((WORD)((DWORD)(l) >> 16))
 
-#define min(a, b) ((a) < (b) ? (a) : (b))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define MAX_STRING_LEN 32
 #define IOT_PARAM_WRITE 0xAE
 #define IOT_PARAM_READ 0xAF