diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index bbf40f624fc8..5c093ffc655b 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -51,6 +51,7 @@ struct trace_iterator {
 	int			cpu_file;
 	struct mutex		mutex;
 	struct ring_buffer_iter	*buffer_iter[NR_CPUS];
+	unsigned long		iter_flags;
 
 	/* The below is zeroed out in pipe_read */
 	struct trace_seq	seq;
@@ -58,7 +59,6 @@ struct trace_iterator {
 	int			cpu;
 	u64			ts;
 
-	unsigned long		iter_flags;
 	loff_t			pos;
 	long			idx;
 
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a3a8a87d7e91..cae34c69752f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2826,6 +2826,9 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
 	/* trace pipe does not show start of buffer */
 	cpumask_setall(iter->started);
 
+	if (trace_flags & TRACE_ITER_LATENCY_FMT)
+		iter->iter_flags |= TRACE_FILE_LAT_FMT;
+
 	iter->cpu_file = cpu_file;
 	iter->tr = &global_trace;
 	mutex_init(&iter->mutex);