diff --git a/pw_watch/py/pw_watch/watch.py b/pw_watch/py/pw_watch/watch.py
index 8ed066e..efda98d 100755
--- a/pw_watch/py/pw_watch/watch.py
+++ b/pw_watch/py/pw_watch/watch.py
@@ -260,10 +260,12 @@
     '*.bloaty',
     '*.c',
     '*.cc',
+    '*.cpp',
     '*.gn',
     '*.gni',
     '*.go',
     '*.h',
+    '*.hpp',
     '*.ld',
     '*.proto',
     '*.py',