diff --git a/libs/compute_api/src/spec.rs b/libs/compute_api/src/spec.rs
index 4ff6831272..9115524e60 100644
--- a/libs/compute_api/src/spec.rs
+++ b/libs/compute_api/src/spec.rs
@@ -75,6 +75,9 @@ pub struct ComputeSpec {
     pub remote_extensions: Option<RemoteExtSpec>,
 
     pub pgbouncer_settings: Option<HashMap<String, String>>,
+
+    // Stripe size for pageserver sharding, in pages
+    pub shard_stripe_size: Option<usize>,
 }
 
 /// Feature flag to signal `compute_ctl` to enable certain experimental functionality.