diff --git a/quickcheck/aefate_code_eqc.erl b/quickcheck/aefate_code_eqc.erl
index 7938d7b..72726a4 100644
--- a/quickcheck/aefate_code_eqc.erl
+++ b/quickcheck/aefate_code_eqc.erl
@@ -77,7 +77,7 @@ prop_opcodes() ->
 
 
 valid_opcodes() ->
-    lists:seq(0, 16#75) ++ lists:seq(16#fa, 16#fd).
+    lists:seq(0, 16#7c) ++ lists:seq(16#fa, 16#fd).
 
 
 fate_code(Failure) ->
diff --git a/src/aeb_aevm_abi.erl b/src/aeb_aevm_abi.erl
index 1d62f36..6b3bfdf 100644
--- a/src/aeb_aevm_abi.erl
+++ b/src/aeb_aevm_abi.erl
@@ -19,6 +19,7 @@
         , typereps_from_type_hash/2
         , function_name_from_type_hash/2
         , get_function_hash_from_calldata/1
+        , abi_version/0
         ]).
 
 -type hash() :: <<_:256>>. %% 256 = ?HASH_SIZE * 8.
@@ -35,6 +36,11 @@
 %%% API
 %%%===================================================================
 
+%% Shall match ?ABI_AEVM_SOPHIA_1
+-spec abi_version() -> integer().
+abi_version() ->
+    1.
+
 %%%===================================================================
 %%% Handle calldata
 
diff --git a/src/aeb_fate_abi.erl b/src/aeb_fate_abi.erl
index 55fb5fc..b54227d 100644
--- a/src/aeb_fate_abi.erl
+++ b/src/aeb_fate_abi.erl
@@ -13,7 +13,8 @@
         , decode_calldata/2
         , get_function_hash_from_calldata/1
         , get_function_name_from_function_hash/2
-        , get_function_type_from_function_hash/2 ]).
+        , get_function_type_from_function_hash/2
+        , abi_version/0 ]).
 
 -include("../include/aeb_fate_data.hrl").
 
@@ -21,6 +22,11 @@
 %%% API
 %%%===================================================================
 
+%% Shall match ?ABI_FATE_SOPHIA_1
+-spec abi_version() -> integer().
+abi_version() ->
+    3.
+
 -spec create_calldata(list(), [term()]) -> {ok, binary()}.
 create_calldata(FunName, Args) ->
     FunctionId = aeb_fate_code:symbol_identifier(list_to_binary(FunName)),