diff --git a/src/builtins/x64/builtins-x64.cc b/src/builtins/x64/builtins-x64.cc
index 96834b4a01..92d1533334 100644
--- a/src/builtins/x64/builtins-x64.cc
+++ b/src/builtins/x64/builtins-x64.cc
@@ -1455,8 +1455,9 @@ void Builtins::Generate_InterpreterEnterBytecodeAdvance(MacroAssembler* masm) {
                                 &if_return);
 
   // Convert new bytecode offset to a Smi and save in the stackframe.
-  __ SmiTag(rbx, kInterpreterBytecodeOffsetRegister);
-  __ movq(Operand(rbp, InterpreterFrameConstants::kBytecodeOffsetFromFp), rbx);
+  __ SmiTag(kInterpreterBytecodeOffsetRegister);
+  __ movq(Operand(rbp, InterpreterFrameConstants::kBytecodeOffsetFromFp),
+          kInterpreterBytecodeOffsetRegister);
 
   Generate_InterpreterEnterBytecode(masm);