diff --git a/main/opcodes/stack-operations.zkasm b/main/opcodes/stack-operations.zkasm
index 9741b1d3..c0006c00 100644
--- a/main/opcodes/stack-operations.zkasm
+++ b/main/opcodes/stack-operations.zkasm
@@ -233,10 +233,10 @@ opDUP1:
     GAS - %GAS_FASTEST_STEP => GAS  :JMPN(outOfGas)
 
     $ => A          :MLOAD(SP-1); [value => A]
-    ; check stack overflow
-    %CALLDATA_OFFSET - SP       :JMPN(stackOverflow)
+
     ; store duplicated value
     A               :MSTORE(SP++); [duplicated_value(A) => SP]
+
     ; check stack overflow
     %CALLDATA_OFFSET - SP       :JMPN(stackOverflow, readCode)