diff --git a/extensions/xt_ACCOUNT.c b/extensions/xt_ACCOUNT.c
index 0455d1a..16dcead 100644
--- a/extensions/xt_ACCOUNT.c
+++ b/extensions/xt_ACCOUNT.c
@@ -30,6 +30,7 @@
 
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <linux/semaphore.h>
 #include <linux/string.h>
 #include <linux/spinlock.h>
 #include <asm/uaccess.h>
@@ -1037,7 +1038,7 @@ static struct nf_sockopt_ops ipt_acc_sockopts = {
 
 static int __init account_tg_init(void)
 {
-	init_MUTEX(&ipt_acc_userspace_mutex);
+	sema_init(&ipt_acc_userspace_mutex, 1);
 
 	if ((ipt_acc_tables =
 	    kmalloc(ACCOUNT_MAX_TABLES *