diff --git a/src/RS232_win.c b/src/RS232_win.c
--- a/src/RS232_win.c
+++ b/src/RS232_win.c
@@ -7,7 +7,7 @@
 
 #include <windows.h>
 #include "RS232.h"
-
+#include <locale.h>
 
 
 
@@ -118,7 +118,11 @@ rs232speed_t rs232cfspeed(unsigned int B
 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);
+        /* Char to Wchar conversion*/
+        int len  = strlen(psPortName),convlen;
+        wchar_t *wcstr = (wchar_t *)malloc((len*sizeof(wchar_t)) + 10);
+        mbstowcs_s(&convlen,wcstr,len, psPortName,len);
+        fd = (rs232port_t)CreateFile(wcstr,GENERIC_READ | GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
         #ifdef RS232_debug
 		if(fd==(rs232port_t)INVALID_HANDLE_VALUE)
 		{