diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index 4285f1f404c2..d5c69860b524 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -83,9 +83,10 @@ void update_vsyscall_tz(void)
 void update_vsyscall(struct timespec *wall_time, struct timespec *wtm,
 			struct clocksource *clock, u32 mult)
 {
-	write_seqcount_begin(&vsyscall_gtod_data.seq);
 	struct timespec monotonic;
 
+	write_seqcount_begin(&vsyscall_gtod_data.seq);
+
 	/* copy vsyscall data */
 	vsyscall_gtod_data.clock.vclock_mode	= clock->archdata.vclock_mode;
 	vsyscall_gtod_data.clock.cycle_last	= clock->cycle_last;