diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 56f3039fe2a7..8ff2c98e9032 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1631,6 +1631,7 @@ int perf_session__peek_event(struct perf_session *session, off_t file_offset,
 	if (event->header.size < hdr_sz || event->header.size > buf_sz)
 		return -1;
 
+	buf += hdr_sz;
 	rest = event->header.size - hdr_sz;
 
 	if (readn(fd, buf, rest) != (ssize_t)rest)