diff --git a/.bzrignore b/.bzrignore
index 2a16bcdb0c8..61037fc0be6 100644
--- a/.bzrignore
+++ b/.bzrignore
@@ -31,6 +31,7 @@ Modules/Setup.config
 Modules/Setup.local
 Modules/config.c
 Parser/pgen
+Parser/pgen.stamp
 Lib/test/data/*
 Lib/lib2to3/Grammar*.pickle
 Lib/lib2to3/PatternGrammar*.pickle
diff --git a/.hgignore b/.hgignore
index 12f288cea7f..ed3d9f7c842 100644
--- a/.hgignore
+++ b/.hgignore
@@ -30,6 +30,7 @@ Modules/Setup.config
 Modules/Setup.local
 Modules/config.c
 Parser/pgen$
+Parser/pgen.stamp$
 ^core
 ^python-gdb.py
 ^pybuilddir.txt