diff --git a/zebra-consensus/src/config.rs b/zebra-consensus/src/config.rs
index a5b036e0..0ad6ac8f 100644
--- a/zebra-consensus/src/config.rs
+++ b/zebra-consensus/src/config.rs
@@ -8,6 +8,9 @@ pub struct Config {
     ///
     /// Setting this option to true enables post-Canopy checkpoints.
     /// (Zebra always checkpoints on Canopy activation.)
+    ///
+    /// Future versions of Zebra may change the mandatory checkpoint
+    /// height.
     pub checkpoint_sync: bool,
 }