diff --git a/include/aeb_opcodes.hrl b/include/aeb_opcodes.hrl
index 8d04333..4eab4e2 100644
--- a/include/aeb_opcodes.hrl
+++ b/include/aeb_opcodes.hrl
@@ -144,6 +144,8 @@
 -define(   'DELEGATECALL', 16#f4).
 
 -define(         'DBGLOC', 16#b1).
+-define(         'DBGDEF', 16#b2).
+-define(       'DBGUNDEF', 16#b3).
 
 -define(     'STATICCALL', 16#fa).
 
diff --git a/src/aeb_fate_generate_ops.erl b/src/aeb_fate_generate_ops.erl
index 5f5f416..5ea912b 100644
--- a/src/aeb_fate_generate_ops.erl
+++ b/src/aeb_fate_generate_ops.erl
@@ -243,6 +243,8 @@ ops_defs() ->
     , { 'BSR',                 16#b0,  false,    true,   true,   ?GAS(10),    [a, a, a],        bin_sr,          {integer, integer}, integer, "Arg0 := Arg1 >> Arg2"}
 
     , { 'DBGLOC',              16#b1,  false,    true,   true,    ?GAS(0),    [a, a, a],        dbgloc,  {string, integer, integer},    none, "Arg" }
+    , { 'DBGDEF',              16#b2,  false,    true,   true,    ?GAS(0),       [a, a],        dbgdef,             {string, tuple},    none, "Arg" }
+    , { 'DBGUNDEF',            16#b3,  false,    true,   true,    ?GAS(0),       [a, a],      dbgundef,             {string, tuple},    none, "Arg" }
 
     , { 'DEACTIVATE',          16#fa,  false,    true,   true,   ?GAS(10), [],           deactivate,                                  {},    none, "Mark the current contract for deactivation."}
     , { 'ABORT',               16#fb,   true,    true,   true,   ?GAS(10), [a],               abort,                            {string},    none, "Abort execution (dont use all gas) with error message in Arg0."}
diff --git a/src/aeb_opcodes.erl b/src/aeb_opcodes.erl
index 8e83b87..eb5d127 100644
--- a/src/aeb_opcodes.erl
+++ b/src/aeb_opcodes.erl
@@ -163,6 +163,8 @@ opcode(?STATICCALL)     -> ?STATICCALL; %% TODO
 opcode(?REVERT)         -> ?REVERT;
 opcode({comment,X})     -> ?COMMENT(X);
 opcode(?DBGLOC)         -> ?DBGLOC;
+opcode(?DBGDEF)         -> ?DBGDEF;
+opcode(?DBGUNDEF)       -> ?DBGUNDEF;
 opcode(?SUICIDE)        -> ?SUICIDE.
 
 
@@ -305,6 +307,8 @@ mnemonic(?STATICCALL)     -> 'STATICCALL'     ;
 mnemonic(?REVERT)         -> 'REVERT'         ;
 mnemonic({comment,_})     -> 'COMMENT'        ;
 mnemonic(?DBGLOC)         -> 'DBGLOC'         ;
+mnemonic(?DBGDEF)         -> 'DBGDEF'         ;
+mnemonic(?DBGUNDEF)       -> 'DBGUNDEF'       ;
 mnemonic(?SUICIDE)        -> 'SUICIDE'        .
 
 
@@ -449,6 +453,8 @@ m_to_op('REVERT')         -> ?REVERT         ;
 m_to_op('COMMENT')        -> ?COMMENT("")    ;
 m_to_op('SUICIDE')        -> ?SUICIDE        ;
 m_to_op('DBGLOC')         -> ?DBGLOC         ;
+m_to_op('DBGDEF')         -> ?DBGDEF         ;
+m_to_op('DBGUNDEF')       -> ?DBGUNDEF       ;
 m_to_op(Data) when 0=<Data, Data=<255
                           -> Data            .