diff --git a/static/build.html b/static/build.html
index 4acb3a29..64a32dcf 100644
--- a/static/build.html
+++ b/static/build.html
@@ -439,7 +439,7 @@ mv vendor/android-prepare-vendor/DEVICE/BUILD_ID/vendor/google_devices/* vendor/
             Consider disabling swap, at least during the signing process.</p>
 
             <p>The encryption passphrase for all the keys generated for a device needs to
-            match.</p>
+            match for compatibility with the GrapheneOS scripts.</p>
 
             <p>To generate keys for crosshatch (you should use unique keys per device
             variant):</p>