diff --git a/src/vm/interp/vm_tgc_c.cpp b/src/vm/interp/vm_tgc_c.cpp
index 196d106..8319ffa 100644
--- a/src/vm/interp/vm_tgc_c.cpp
+++ b/src/vm/interp/vm_tgc_c.cpp
@@ -86,7 +86,7 @@ protected:
     using compile_ret_t = virt_addr_t;
     using compile_func = compile_ret_t (this_class::*)(virt_addr_t &pc, code_word_t instr);
 
-    inline const char *name(size_t index){return index<traits::reg_aliases.size()?traits::reg_aliases.at(index):"illegal";}
+    inline const char *name(size_t index){return index<traits::reg_aliases.size()?traits::reg_aliases[index]:"illegal";}
 
     typename arch::traits<ARCH>::opcode_e decode_inst_id(code_word_t instr);
     virt_addr_t execute_inst(finish_cond_e cond, virt_addr_t start, uint64_t icount_limit) override;