diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index ed3559944fcf64219454f1fa0ff932886f369fd2..6b17a11e42a24aed7674be4f1b00cf6791797bc6 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1013,7 +1013,7 @@ rb_event_index(struct ring_buffer_event *event)
 {
 	unsigned long addr = (unsigned long)event;
 
-	return (addr & ~PAGE_MASK) - (PAGE_SIZE - BUF_PAGE_SIZE);
+	return (addr & ~PAGE_MASK) - BUF_PAGE_HDR_SIZE;
 }
 
 static inline int