diff --git a/src/iss/arch/tgc5c.cpp b/src/iss/arch/tgc5c.cpp
index ae911d7..bdfbee3 100644
--- a/src/iss/arch/tgc5c.cpp
+++ b/src/iss/arch/tgc5c.cpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2017 - 2020 MINRES Technologies GmbH
+ * Copyright (C) 2024 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/iss/arch/tgc5c.h b/src/iss/arch/tgc5c.h
index 606256a..a8819b8 100644
--- a/src/iss/arch/tgc5c.h
+++ b/src/iss/arch/tgc5c.h
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (C) 2017 - 2021 MINRES Technologies GmbH
+ * Copyright (C) 2024 MINRES Technologies GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/vm/interp/vm_tgc5c.cpp b/src/vm/interp/vm_tgc5c.cpp
index 1c1d410..db5c0d4 100644
--- a/src/vm/interp/vm_tgc5c.cpp
+++ b/src/vm/interp/vm_tgc5c.cpp
@@ -96,7 +96,8 @@ 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[index]:"illegal";}
+    inline const char *name(size_t index){return traits::reg_aliases.at(index);}
+
 
     virt_addr_t execute_inst(finish_cond_e cond, virt_addr_t start, uint64_t icount_limit) override;