diff --git a/src/serialport_linux.cpp b/src/serialport_linux.cpp
index 4ee4602012..c87f6a5b58 100755
--- a/src/serialport_linux.cpp
+++ b/src/serialport_linux.cpp
@@ -8,7 +8,7 @@
 int linuxSetCustomBaudRate(const int fd, const unsigned int baudrate) {
     struct termios2 t;
 
-    if(ioctl(fd, TCGETS2, &t)) {
+    if (ioctl(fd, TCGETS2, &t)) {
       return -1;
     }
 
@@ -16,7 +16,7 @@ int linuxSetCustomBaudRate(const int fd, const unsigned int baudrate) {
     t.c_cflag |= BOTHER;
     t.c_ospeed = t.c_ispeed = baudrate;
 
-    if(ioctl(fd, TCSETS2, &t)) {
+    if (ioctl(fd, TCSETS2, &t)) {
       return -2;
     }
 
@@ -27,11 +27,11 @@ int linuxSetCustomBaudRate(const int fd, const unsigned int baudrate) {
 int linuxGetSystemBaudRate(const int fd, int* const outbaud) {
   struct termios2 t;
 
-  if(ioctl(fd, TCGETS2, &t)) {
+  if (ioctl(fd, TCGETS2, &t)) {
     return -1;
   }
 
-  *outbaud = (int)t.c_ospeed;
+  *outbaud = static_cast<int>(t.c_ospeed);
 
   return 0;
 }
diff --git a/src/serialport_linux.h b/src/serialport_linux.h
index 0388ac3210..1a7b98c9c5 100755
--- a/src/serialport_linux.h
+++ b/src/serialport_linux.h
@@ -1,8 +1,8 @@
-#ifndef CUSTOM_BAUDRATE_H
-#define CUSTOM_BAUDRATE_H
+#ifndef SRC_SERIALPORT_LINUX_H_
+#define SRC_SERIALPORT_LINUX_H_
 
 int linuxSetCustomBaudRate(const int fd, const unsigned int baudrate);
 int linuxGetSystemBaudRate(const int fd, int* const outbaud);
 
-#endif
+#endif  // SRC_SERIALPORT_LINUX_H_
 
diff --git a/src/serialport_unix.cpp b/src/serialport_unix.cpp
index 43e7f741d1..b8979959e6 100644
--- a/src/serialport_unix.cpp
+++ b/src/serialport_unix.cpp
@@ -114,10 +114,12 @@ int setBaudRate(ConnectionOptionsBaton *data) {
       int err = linuxSetCustomBaudRate(fd, data->baudRate);
 
       if (err == -1) {
-        snprintf(data->errorString, sizeof(data->errorString), "Error: %s || while retrieving termios2 info", strerror(errno));
+        snprintf(data->errorString, sizeof(data->errorString),
+                 "Error: %s || while retrieving termios2 info", strerror(errno));
         return -1;
-      } else if(err == -2) {
-        snprintf(data->errorString, sizeof(data->errorString), "Error: %s || while setting custom baud rate of %d", strerror(errno), data->baudRate);
+      } else if (err == -2) {
+        snprintf(data->errorString, sizeof(data->errorString),
+                 "Error: %s || while setting custom baud rate of %d", strerror(errno), data->baudRate);
         return -1;
       }
 
@@ -373,7 +375,7 @@ void EIO_GetBaudRate(uv_work_t* req) {
   }
   #endif
 
-  // TODO implement on mac
+  // TODO(Fumon) implement on mac
   #if defined(MAC_OS_X_VERSION_10_4) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4)
   snprintf(data->errorString, sizeof(data->errorString), "Error: System baud rate check not implemented on darwin");
   return;
diff --git a/src/serialport_win.cpp b/src/serialport_win.cpp
index 3786e5e2b9..f2276bdafc 100644
--- a/src/serialport_win.cpp
+++ b/src/serialport_win.cpp
@@ -178,7 +178,7 @@ void EIO_Open(uv_work_t* req) {
   PurgeComm(file, PURGE_RXCLEAR);
   PurgeComm(file, PURGE_TXCLEAR);
 
-  data->result = static_cast<int>(file);
+  data->result = (int)file;  // NOLINT
 }
 
 void EIO_Update(uv_work_t* req) {
@@ -268,7 +268,7 @@ void EIO_GetBaudRate(uv_work_t* req) {
     return;
   }
 
-  data->baudRate = (int)dcb.BaudRate;
+  data->baudRate = static_cast<int>(dcb.BaudRate);
 }
 
 bool IsClosingHandle(int fd) {
@@ -613,7 +613,7 @@ NAN_METHOD(List) {
 void EIO_List(uv_work_t* req) {
   ListBaton* data = static_cast<ListBaton*>(req->data);
 
-  GUID *guidDev = reinterpret_cast<GUID*>(& GUID_DEVCLASS_PORTS);
+  GUID *guidDev = (GUID*)& GUID_DEVCLASS_PORTS;  // NOLINT
   HDEVINFO hDevInfo = SetupDiGetClassDevs(guidDev, NULL, NULL, DIGCF_PRESENT | DIGCF_PROFILE);
   SP_DEVINFO_DATA deviceInfoData;