diff --git a/src/RS232.h b/src/RS232.h
--- a/src/RS232.h
+++ b/src/RS232.h
@@ -7,7 +7,7 @@
 #define rs232noerr 0
 typedef int  rs232port_t;
 typedef int  rs232speed_t;
-typedef enum {rs232OneStop=1,rs232One5Stop=2,rs232TwoStop=2}rs232stop;
+typedef enum {rs232OneStop,rs232One5Stop,rs232TwoStop}rs232stop;
 typedef enum {rs232parityNo,rs232parityOdd,rs232parityEven}rs232parity;
 
 
diff --git a/src/RS232_unix.c b/src/RS232_unix.c
--- a/src/RS232_unix.c
+++ b/src/RS232_unix.c
@@ -134,12 +134,18 @@ int rs232setnbstop(rs232port_t fd, rs232
 		tcgetattr((int)fd, &terminos);
 		switch(NbStop)
 		{
-			case 2:
+			case rs232OneStop:
+			     terminos.c_cflag &= ~CSTOPB;
+			     break;
+                        case rs232One5Stop:
 				terminos.c_cflag |= CSTOPB;
-			break;
+                                break;
+			case rs232TwoStop:
+				terminos.c_cflag |= CSTOPB;
+                                break;
 			default:
 				terminos.c_cflag &= ~CSTOPB;
-			break;
+                                break;
 		}
 		tcsetattr((int)fd, TCSANOW, &terminos);
 		return 0;
diff --git a/src/RS232_win.c b/src/RS232_win.c
--- a/src/RS232_win.c
+++ b/src/RS232_win.c
@@ -45,7 +45,7 @@ int privatedecodestop(rs232stop NbStop)
 		case rs232TwoStop:
 			return TWOSTOPBITS;
 			break;
-		default;
+		default:
 			return ONESTOPBIT;
 			break;
 	}
@@ -101,7 +101,7 @@ rs232port_t rs232open(char* psPortName)
         rs232port_t fd;
         fd = (rs232port_t)CreateFile(psPortName,GENERIC_READ | GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
         #ifdef debug
-		if(fd==INVALID_HANDLE_VALUE)
+		if(fd==(rs232port_t)INVALID_HANDLE_VALUE)
 		{
 			printf("can't open Port\n");
 			return (rs232port_t)badPortValue;