1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/char/rocket_int.h b/drivers/char/rocket_int.h
index 3a8bcc85bc14..89b4d7b10d12 100644
--- a/drivers/char/rocket_int.h
+++ b/drivers/char/rocket_int.h
@@ -15,6 +15,8 @@
 #define ROCKET_TYPE_MODEMIII    3
 #define ROCKET_TYPE_PC104       4
 
+#include <linux/mutex.h>
+
 #include <asm/io.h>
 #include <asm/byteorder.h>
 
@@ -1171,7 +1173,7 @@ struct r_port {
         struct wait_queue *close_wait;
 #endif
         spinlock_t slock;
-        struct semaphore write_sem;
+        struct mutex write_mtx;
 };
 
 #define RPORT_MAGIC 0x525001