diff --git a/base/OWNERS b/base/OWNERS
index 9501e57..255a11e 100644
--- a/base/OWNERS
+++ b/base/OWNERS
@@ -41,6 +41,8 @@
 per-file dcheck*=pbos@chromium.org
 per-file logging*=olivierli@chromium.org
 per-file logging*=pbos@chromium.org
+per-file notimplemented.h=olivierli@chromium.org
+per-file notimplemented.h=pbos@chromium.org
 per-file notreached.h=olivierli@chromium.org
 per-file notreached.h=pbos@chromium.org