diff --git a/include/aeb_opcodes.hrl b/include/aeb_opcodes.hrl
index a0e8418..9d0638c 100644
--- a/include/aeb_opcodes.hrl
+++ b/include/aeb_opcodes.hrl
@@ -146,8 +146,6 @@
 -define(        'DBG_LOC', 16#b1).
 -define(        'DBG_DEF', 16#b2).
 -define(      'DBG_UNDEF', 16#b3).
--define(       'DBG_CALL', 16#b4).
--define(     'DBG_RETURN', 16#b5).
 
 -define(     'STATICCALL', 16#fa).
 
diff --git a/src/aeb_fate_generate_ops.erl b/src/aeb_fate_generate_ops.erl
index 3db73f5..c5f873c 100644
--- a/src/aeb_fate_generate_ops.erl
+++ b/src/aeb_fate_generate_ops.erl
@@ -245,8 +245,6 @@ ops_defs() ->
     , { 'DBG_LOC',             16#b1,  false,    true,   true,    ?GAS(0),       [a, a],       dbg_loc,           {string, integer},    none, "Debug Op: Execution location. Args = {file_name, line_num}" }
     , { 'DBG_DEF',             16#b2,  false,    true,   true,    ?GAS(0),       [a, a],       dbg_def,               {string, any},    none, "Debug Op: Define a variable. Args = {var_name, register}" }
     , { 'DBG_UNDEF',           16#b3,  false,    true,   true,    ?GAS(0),       [a, a],     dbg_undef,               {string, any},    none, "Debug Op: Undefine a variable. Args = {var_name, register}" }
-    , { 'DBG_CALL',            16#b4,  false,    true,   true,    ?GAS(0),    [a, a, a],      dbg_call,  {address, string, boolean},    none, "Debug Op: Push to call stack. Args = {contract_pk, fun_name, is_tail_call}" }
-    , { 'DBG_RETURN',          16#b5,  false,    true,   true,    ?GAS(0),           [],    dbg_return,                          {},    none, "Debug Op: Pop from call stack" }
 
     , { '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 bc9e5fd..417abfe 100644
--- a/src/aeb_opcodes.erl
+++ b/src/aeb_opcodes.erl
@@ -165,8 +165,6 @@ opcode({comment,X})     -> ?COMMENT(X);
 opcode(?DBG_LOC)        -> ?DBG_LOC;
 opcode(?DBG_DEF)        -> ?DBG_DEF;
 opcode(?DBG_UNDEF)      -> ?DBG_UNDEF;
-opcode(?DBG_CALL)       -> ?DBG_CALL;
-opcode(?DBG_RETURN)     -> ?DBG_RETURN;
 opcode(?SUICIDE)        -> ?SUICIDE.
 
 
@@ -311,8 +309,6 @@ mnemonic({comment,_})     -> 'COMMENT'        ;
 mnemonic(?DBG_LOC)        -> 'DBG_LOC'        ;
 mnemonic(?DBG_DEF)        -> 'DBG_DEF'        ;
 mnemonic(?DBG_UNDEF)      -> 'DBG_UNDEF'      ;
-mnemonic(?DBG_CALL)       -> 'DBG_CALL'       ;
-mnemonic(?DBG_RETURN)     -> 'DBG_RETURN'     ;
 mnemonic(?SUICIDE)        -> 'SUICIDE'        .
 
 
@@ -459,8 +455,6 @@ m_to_op('SUICIDE')        -> ?SUICIDE        ;
 m_to_op('DBG_LOC')        -> ?DBG_LOC        ;
 m_to_op('DBG_DEF')        -> ?DBG_DEF        ;
 m_to_op('DBG_UNDEF')      -> ?DBG_UNDEF      ;
-m_to_op('DBG_CALL')       -> ?DBG_CALL       ;
-m_to_op('DBG_RETURN')     -> ?DBG_RETURN     ;
 m_to_op(Data) when 0=<Data, Data=<255
                           -> Data            .