diff --git a/cle/backends/static_archive.py b/cle/backends/static_archive.py
index 03d9ba9f..7c7c687d 100644
--- a/cle/backends/static_archive.py
+++ b/cle/backends/static_archive.py
@@ -40,7 +40,7 @@ def __init__(self, *args, **kwargs):
             self.child_objects.append(child)
 
         if self.child_objects:
-            self.arch = self.child_objects[0].arch
+            self._arch = self.child_objects[0].arch
         else:
             log.warning("Loaded empty static archive?")
         self.has_memory = False
diff --git a/cle/backends/uefi_firmware.py b/cle/backends/uefi_firmware.py
index fbf53b3f..6d6d54a5 100644
--- a/cle/backends/uefi_firmware.py
+++ b/cle/backends/uefi_firmware.py
@@ -94,7 +94,7 @@ def __init__(self, *args, **kwargs) -> None:
                 self.child_objects.append(child)
 
         if self.child_objects:
-            self.arch = self.child_objects[0].arch
+            self._arch = self.child_objects[0].arch
         else:
             log.warning("Loaded empty UEFI firmware?")
         self.has_memory = False