diff --git a/include/evm.h b/include/evm.h
index 9351b69..0b9d7de 100644
--- a/include/evm.h
+++ b/include/evm.h
@@ -100,7 +100,8 @@ enum evm_query_key {
     EVM_TIMESTAMP = 9,        ///< Current block timestamp for TIMESTAMP.
     EVM_CODE_BY_ADDRESS = 10, ///< Code by an address for EXTCODE/SIZE.
     EVM_BALANCE = 11,         ///< Balance of a given address for BALANCE.
-    EVM_BLOCKHASH = 12        ///< Block hash of by block number for BLOCKHASH.
+    EVM_BLOCKHASH = 12,       ///< Block hash of by block number for BLOCKHASH.
+    EVM_ACCOUNT_EXISTS = 13
 };