diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 0bb830f6b49c47d0110a0bf6fa6d8bf9122c2106..61c54213704b812d2dca1ac824029ebd0c7848e6 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2327,7 +2327,8 @@ int perf_session__write_header(struct perf_session *session,
 		}
 	}
 
-	header->data_offset = lseek(fd, 0, SEEK_CUR);
+	if (!header->data_offset)
+		header->data_offset = lseek(fd, 0, SEEK_CUR);
 	header->feat_offset = header->data_offset + header->data_size;
 
 	if (at_exit) {