diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index a6b4f02..3b47472 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -2318,7 +2318,7 @@
 			port->board = board;
 			port->gs.rd = &sx_real_driver;
 #ifdef NEW_WRITE_LOCKING
-			port->gs.port_write_sem = MUTEX;
+			port->gs.port_write_mutex = MUTEX;
 #endif
 			port->gs.driver_lock = SPIN_LOCK_UNLOCKED;
 			/*