diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
index 51d8dd6..43d092e 100644
--- a/PRESUBMIT.cfg
+++ b/PRESUBMIT.cfg
@@ -2,6 +2,9 @@
 # Comment out the disable-flags for any checks you want to leave enabled.
 
 [Hook Overrides]
+# Make sure Manifest files are valid.
+manifest_check: true
+
 stray_whitespace_check: false
 long_line_check: false
 cros_license_check: false