diff --git a/solana/transaction.py b/solana/transaction.py
index e1bd5bce..88ffea06 100644
--- a/solana/transaction.py
+++ b/solana/transaction.py
@@ -39,13 +39,13 @@ class TransactionInstruction(NamedTuple):
     """Transaction Instruction class."""
 
     keys: List[AccountMeta]
-    """Program input."""
-    program_id: PublicKey
     """Public keys to include in this transaction Boolean represents whether this
     pubkey needs to sign the transaction.
     """
-    data: bytes = bytes(0)
+    program_id: PublicKey
     """Program Id to execute."""
+    data: bytes = bytes(0)
+    """Program input."""
 
 
 class NonceInformation(NamedTuple):