diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index fe08660ce0bd05841869ed59f762eceed7c089d7..124760bb37b526e42642e0408066c80f8be6c732 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -13,6 +13,7 @@ perf*.xml
 perf*.html
 common-cmds.h
 perf.data
+perf.data.old
 tags
 TAGS
 cscope*