diff --git a/bochs/config.h.in b/bochs/config.h.in
index d75c45df3e..c1d40b5893 100644
--- a/bochs/config.h.in
+++ b/bochs/config.h.in
@@ -232,7 +232,7 @@
 #error You must use SMF to have plugins
 #endif
 
-#define USE_RAW_SERIAL 0
+#define BX_USE_RAW_SERIAL 0
 
 // This option enables RAM file backing for large guest memory with a smaller
 // amount host memory, without causing a panic when host memory is exhausted.
diff --git a/bochs/configure b/bochs/configure
index 380e7f904d..588d682d0e 100755
--- a/bochs/configure
+++ b/bochs/configure
@@ -24911,19 +24911,19 @@ then :
   enableval=$enable_raw_serial; if test "$enableval" = yes; then
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-    printf "%s\n" "#define USE_RAW_SERIAL 1" >>confdefs.h
+    printf "%s\n" "#define BX_USE_RAW_SERIAL 1" >>confdefs.h
 
    else
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-    printf "%s\n" "#define USE_RAW_SERIAL 0" >>confdefs.h
+    printf "%s\n" "#define BX_USE_RAW_SERIAL 0" >>confdefs.h
 
    fi
 else $as_nop
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-    printf "%s\n" "#define USE_RAW_SERIAL 0" >>confdefs.h
+    printf "%s\n" "#define BX_USE_RAW_SERIAL 0" >>confdefs.h
 
 
 
diff --git a/bochs/configure.ac b/bochs/configure.ac
index e98d1d7b73..784887eb2a 100644
--- a/bochs/configure.ac
+++ b/bochs/configure.ac
@@ -1784,14 +1784,14 @@ AC_ARG_ENABLE(raw-serial,
   AS_HELP_STRING([--enable-raw-serial], [use raw serial port access (no - incomplete)]),
   [if test "$enableval" = yes; then
     AC_MSG_RESULT(yes)
-    AC_DEFINE(USE_RAW_SERIAL, 1)
+    AC_DEFINE(BX_USE_RAW_SERIAL, 1)
    else
     AC_MSG_RESULT(no)
-    AC_DEFINE(USE_RAW_SERIAL, 0)
+    AC_DEFINE(BX_USE_RAW_SERIAL, 0)
    fi],
   [
     AC_MSG_RESULT(no)
-    AC_DEFINE(USE_RAW_SERIAL, 0)
+    AC_DEFINE(BX_USE_RAW_SERIAL, 0)
     ]
   )
 
diff --git a/bochs/iodev/serial.cc b/bochs/iodev/serial.cc
index 8d2374ffc3..7e11081cfb 100644
--- a/bochs/iodev/serial.cc
+++ b/bochs/iodev/serial.cc
@@ -50,7 +50,7 @@ typedef int SOCKET;
 #define FILE_FLAG_FIRST_PIPE_INSTANCE 0
 #endif
 
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
 #include "serial_raw.h"
 #endif
 
@@ -216,7 +216,7 @@ bx_serial_c::~bx_serial_c(void)
 #endif
           break;
         case BX_SER_MODE_RAW:
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
           delete [] BX_SER_THIS s[i].raw;
 #endif
           break;
@@ -438,7 +438,7 @@ bx_serial_c::init(void)
         BX_PANIC(("serial terminal support not available"));
 #endif   /* def SERIAL_ENABLE */
       } else if (mode == BX_SER_MODE_RAW) {
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
         BX_SER_THIS s[i].raw = new serial_raw(dev);
         BX_SER_THIS s[i].io_mode = BX_SER_MODE_RAW;
 #else
@@ -899,7 +899,7 @@ Bit32u bx_serial_c::read(Bit32u address, unsigned io_len)
       break;
 
     case BX_SER_MSR: /* MODEM status register */
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
       if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
         bool prev_cts = BX_SER_THIS s[port].modem_status.cts;
         bool prev_dsr = BX_SER_THIS s[port].modem_status.dsr;
@@ -974,7 +974,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
 #endif  // !BX_USE_SER_SMF
   bool gen_int = 0;
   Bit8u offset, new_wordlen;
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
   bool mcr_changed = 0;
   Bit8u p_mode;
 #endif
@@ -1156,7 +1156,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
 
     case BX_SER_LCR: /* Line control register */
       new_wordlen = value & 0x03;
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
       if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
         if (BX_SER_THIS s[port].line_cntl.wordlen_sel != new_wordlen) {
           BX_SER_THIS s[port].raw->set_data_bits(new_wordlen + 5);
@@ -1179,7 +1179,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
           BX_SER_THIS s[port].raw->set_break(new_b6);
         }
       }
-#endif // USE_RAW_SERIAL
+#endif // BX_USE_RAW_SERIAL
       /* These are ignored, but set them up so they can be read back */
       BX_SER_THIS s[port].line_cntl.stopbits = new_b2;
       BX_SER_THIS s[port].line_cntl.parity_enable = new_b3;
@@ -1201,7 +1201,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
             BX_SER_THIS s[port].baudrate = new_baudrate;
             restart_timer = 1;
             BX_DEBUG(("com%d: baud rate set to %d", port+1, BX_SER_THIS s[port].baudrate));
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
             if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
               BX_SER_THIS s[port].raw->set_baudrate(BX_SER_THIS s[port].baudrate);
             }
@@ -1238,7 +1238,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
           BX_SER_THIS detect_mouse = 2;
         }
       }
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
       if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
         mcr_changed = (BX_SER_THIS s[port].modem_cntl.dtr != new_b0) |
                       (BX_SER_THIS s[port].modem_cntl.rts != new_b1);
@@ -1253,7 +1253,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
         BX_SER_THIS s[port].modem_cntl.local_loopback = new_b4;
         if (BX_SER_THIS s[port].modem_cntl.local_loopback) {
           /* transition to loopback mode */
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
           if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
             if (BX_SER_THIS s[port].modem_cntl.dtr ||
                 BX_SER_THIS s[port].modem_cntl.rts) {
@@ -1262,7 +1262,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
           }
 #endif
           if (BX_SER_THIS s[port].line_cntl.break_cntl) {
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
             if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
               BX_SER_THIS s[port].raw->set_break(0);
             }
@@ -1273,7 +1273,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
           }
         } else {
           /* transition to normal mode */
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
           if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
             mcr_changed = 1;
             if (BX_SER_THIS s[port].line_cntl.break_cntl) {
@@ -1337,7 +1337,7 @@ void bx_serial_c::write(Bit32u address, Bit32u value, unsigned io_len)
         }
 
         if (BX_SER_THIS s[port].io_mode == BX_SER_MODE_RAW) {
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
           if (mcr_changed) {
             BX_SER_THIS s[port].raw->set_modem_control(value & 0x03);
           }
@@ -1456,7 +1456,7 @@ void bx_serial_c::tx_timer(void)
 #endif
       break;
     case BX_SER_MODE_RAW:
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
       if (!BX_SER_THIS s[port].raw->ready_transmit())
         BX_PANIC(("com%d: not ready to transmit", port+1));
       BX_SER_THIS s[port].raw->transmit(BX_SER_THIS s[port].tsrbuffer);
@@ -1564,7 +1564,7 @@ void bx_serial_c::rx_timer(void)
 #endif
         break;
       case BX_SER_MODE_RAW:
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
         int data;
         if ((data_ready = BX_SER_THIS s[port].raw->ready_receive())) {
           data = BX_SER_THIS s[port].raw->receive();
diff --git a/bochs/iodev/serial.h b/bochs/iodev/serial.h
index fcec9134fb..80768013b8 100644
--- a/bochs/iodev/serial.h
+++ b/bochs/iodev/serial.h
@@ -82,7 +82,7 @@ enum {
   BX_SER_INT_FIFO
 };
 
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
 class serial_raw;
 #endif
 
@@ -121,7 +121,7 @@ typedef struct {
   HANDLE pipe;
 #endif
 
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
   serial_raw* raw;
 #endif
 #if defined(SERIAL_ENABLE) && !defined(BX_SER_WIN32)
diff --git a/bochs/iodev/serial_raw.cc b/bochs/iodev/serial_raw.cc
index ea2735a598..8fc9aa6062 100644
--- a/bochs/iodev/serial_raw.cc
+++ b/bochs/iodev/serial_raw.cc
@@ -26,7 +26,7 @@
 
 #include "iodev.h"
 
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
 
 #include "serial_raw.h"
 
diff --git a/bochs/iodev/serial_raw.h b/bochs/iodev/serial_raw.h
index 83c740536f..d944d4af83 100644
--- a/bochs/iodev/serial_raw.h
+++ b/bochs/iodev/serial_raw.h
@@ -18,7 +18,7 @@
 //  License along with this library; if not, write to the Free Software
 //  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 
-#if USE_RAW_SERIAL
+#if BX_USE_RAW_SERIAL
 
 #ifdef __linux__
 #include <linux/serial.h>