diff --git a/proto/txn.proto b/proto/txn.proto
index ac550ae..2c3304c 100644
--- a/proto/txn.proto
+++ b/proto/txn.proto
@@ -70,8 +70,8 @@ message TxnContext {
   // Up to 300 (actually 301) most recent blockhashes (ordered from oldest to newest)
   repeated bytes blockhash_queue = 3;
 
-  EpochContext epoch_ctx = 4;
-  SlotContext slot_ctx = 5;
+  EpochContext epoch_context = 4;
+  SlotContext slot_context = 5;
 }
 
 // The resulting state of an account after a transaction