diff --git a/rpc/src/rpc.rs b/rpc/src/rpc.rs
index 5cc5b82344e0d1..78869d4ad9a9c1 100644
--- a/rpc/src/rpc.rs
+++ b/rpc/src/rpc.rs
@@ -1786,16 +1786,10 @@ impl JsonRpcRequestProcessor {
         } else {
             StakeActivationState::Inactive
         };
-        let inactive_stake = match stake_activation_state {
-            StakeActivationState::Activating => activating,
-            StakeActivationState::Active => 0,
-            StakeActivationState::Deactivating => stake_account
-                .lamports()
-                .saturating_sub(effective + rent_exempt_reserve),
-            StakeActivationState::Inactive => {
-                stake_account.lamports().saturating_sub(rent_exempt_reserve)
-            }
-        };
+        let inactive_stake = stake_account
+            .lamports()
+            .saturating_sub(effective)
+            .saturating_sub(rent_exempt_reserve);
         Ok(RpcStakeActivation {
             state: stake_activation_state,
             active: effective,
@@ -2982,14 +2976,6 @@ pub mod rpc_accounts {
             block: Slot,
         ) -> Result<RpcBlockCommitment<BlockCommitmentArray>>;
 
-        #[rpc(meta, name = "getStakeActivation")]
-        fn get_stake_activation(
-            &self,
-            meta: Self::Metadata,
-            pubkey_str: String,
-            config: Option<RpcEpochConfig>,
-        ) -> Result<RpcStakeActivation>;
-
         // SPL Token-specific RPC endpoints
         // See https://github.com/solana-labs/solana-program-library/releases/tag/token-v2.0.0 for
         // program details
@@ -3062,20 +3048,6 @@ pub mod rpc_accounts {
             Ok(meta.get_block_commitment(block))
         }
 
-        fn get_stake_activation(
-            &self,
-            meta: Self::Metadata,
-            pubkey_str: String,
-            config: Option<RpcEpochConfig>,
-        ) -> Result<RpcStakeActivation> {
-            debug!(
-                "get_stake_activation rpc request received: {:?}",
-                pubkey_str
-            );
-            let pubkey = verify_pubkey(&pubkey_str)?;
-            meta.get_stake_activation(&pubkey, config)
-        }
-
         fn get_token_account_balance(
             &self,
             meta: Self::Metadata,
@@ -4082,7 +4054,43 @@ fn rpc_perf_sample_from_perf_sample(slot: u64, sample: PerfSample) -> RpcPerfSam
     }
 }
 
-// RPC methods deprecated in v1.8
+pub mod rpc_deprecated_v1_18 {
+    use super::*;
+    #[rpc]
+    pub trait DeprecatedV1_18 {
+        type Metadata;
+
+        // DEPRECATED
+        #[rpc(meta, name = "getStakeActivation")]
+        fn get_stake_activation(
+            &self,
+            meta: Self::Metadata,
+            pubkey_str: String,
+            config: Option<RpcEpochConfig>,
+        ) -> Result<RpcStakeActivation>;
+    }
+
+    pub struct DeprecatedV1_18Impl;
+    impl DeprecatedV1_18 for DeprecatedV1_18Impl {
+        type Metadata = JsonRpcRequestProcessor;
+
+        fn get_stake_activation(
+            &self,
+            meta: Self::Metadata,
+            pubkey_str: String,
+            config: Option<RpcEpochConfig>,
+        ) -> Result<RpcStakeActivation> {
+            debug!(
+                "get_stake_activation rpc request received: {:?}",
+                pubkey_str
+            );
+            let pubkey = verify_pubkey(&pubkey_str)?;
+            meta.get_stake_activation(&pubkey, config)
+        }
+    }
+}
+
+// RPC methods deprecated in v1.9
 pub mod rpc_deprecated_v1_9 {
     #![allow(deprecated)]
     use super::*;
diff --git a/rpc/src/rpc_service.rs b/rpc/src/rpc_service.rs
index 8597394f102325..d8791ab6c3bf6b 100644
--- a/rpc/src/rpc_service.rs
+++ b/rpc/src/rpc_service.rs
@@ -6,8 +6,9 @@ use {
         max_slots::MaxSlots,
         optimistically_confirmed_bank_tracker::OptimisticallyConfirmedBank,
         rpc::{
-            rpc_accounts::*, rpc_accounts_scan::*, rpc_bank::*, rpc_deprecated_v1_7::*,
-            rpc_deprecated_v1_9::*, rpc_full::*, rpc_minimal::*, rpc_obsolete_v1_7::*, *,
+            rpc_accounts::*, rpc_accounts_scan::*, rpc_bank::*, rpc_deprecated_v1_18::*,
+            rpc_deprecated_v1_7::*, rpc_deprecated_v1_9::*, rpc_full::*, rpc_minimal::*,
+            rpc_obsolete_v1_7::*, *,
         },
         rpc_cache::LargestAccountsCache,
         rpc_health::*,
@@ -510,6 +511,7 @@ impl JsonRpcService {
                     io.extend_with(rpc_full::FullImpl.to_delegate());
                     io.extend_with(rpc_deprecated_v1_7::DeprecatedV1_7Impl.to_delegate());
                     io.extend_with(rpc_deprecated_v1_9::DeprecatedV1_9Impl.to_delegate());
+                    io.extend_with(rpc_deprecated_v1_18::DeprecatedV1_18Impl.to_delegate());
                 }
                 if obsolete_v1_7_api {
                     io.extend_with(rpc_obsolete_v1_7::ObsoleteV1_7Impl.to_delegate());