diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index bfc1779..427dac9 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -4,6 +4,7 @@
 #include <linux/config.h>
 #include <linux/socket.h>
 #include <linux/un.h>
+#include <linux/mutex.h>
 #include <net/sock.h>
 
 extern void unix_inflight(struct file *fp);
@@ -71,7 +72,7 @@
         struct unix_address     *addr;
         struct dentry		*dentry;
         struct vfsmount		*mnt;
-        struct semaphore        readsem;
+	struct mutex		readlock;
         struct sock		*peer;
         struct sock		*other;
         struct sock		*gc_tree;