diff --git a/rpc-client-api/src/request.rs b/rpc-client-api/src/request.rs
index 1bcc42179d96ec..70c9847563ac5e 100644
--- a/rpc-client-api/src/request.rs
+++ b/rpc-client-api/src/request.rs
@@ -48,6 +48,10 @@ pub enum RpcRequest {
     GetStorageTurn,
     GetStorageTurnRate,
     GetSlotsPerSegment,
+    #[deprecated(
+        since = "1.18.18",
+        note = "Do not use; getStakeActivation is not supported by the JSON-RPC server."
+    )]
     GetStakeActivation,
     GetStakeMinimumDelegation,
     GetStoragePubkeysForSlot,