Fix proper check of HAVE_DECL_TIOCSRS485 in recent Win32 fix

Stéphane Raimbault
1 parent 4583f5ce
Showing 1 changed file with 1 additions and 1 deletions
src/modbus-rtu.c
@@ -745,7 +745,7 @@ int modbus_rtu_set_serial_mode(modbus_t *ctx, int mode)
 int modbus_rtu_get_serial_mode(modbus_t *ctx) {
     if (ctx->backend->backend_type == _MODBUS_BACKEND_TYPE_RTU) {
-#if defined(HAVE_DECL_TIOCSRS485)
+#if HAVE_DECL_TIOCSRS485
         modbus_rtu_t *ctx_rtu = ctx->backend_data;
         return ctx_rtu->serial_mode;
 #else