diff --git a/core/src/main/kotlin/net/corda/core/messaging/CordaRPCOps.kt b/core/src/main/kotlin/net/corda/core/messaging/CordaRPCOps.kt
index 60c3465970..6844b95ca6 100644
--- a/core/src/main/kotlin/net/corda/core/messaging/CordaRPCOps.kt
+++ b/core/src/main/kotlin/net/corda/core/messaging/CordaRPCOps.kt
@@ -1,5 +1,6 @@
 package net.corda.core.messaging
 
+import net.corda.core.CordaInternal
 import net.corda.core.concurrent.CordaFuture
 import net.corda.core.context.InvocationContext
 import net.corda.core.contracts.ContractState
@@ -199,6 +200,7 @@ interface CordaRPCOps : RPCOps {
      *
      * TODO This method should be removed once SGX work is finalised and the design of the corresponding API using [FilteredTransaction] can be started
      */
+    @CordaInternal
     @Deprecated("This method is intended only for internal use and will be removed from the public API soon.")
     fun internalFindVerifiedTransaction(txnId: SecureHash): SignedTransaction?