diff --git a/src/pyrad3/utils.py b/src/pyrad3/utils.py
index 291f88a..dd749ef 100644
--- a/src/pyrad3/utils.py
+++ b/src/pyrad3/utils.py
@@ -118,11 +118,9 @@ def pre_decode_attributes(  # pylint: disable=too-many-branches
                 tmp_attributes = decode_vsa(rad_dict, key, value, offset)
             else:
                 if attr_def.datatype == Datatype.extended:
-                    key, value, modifier = decode_extended(key, value, offset)
+                    key, value, modifier = decode_extended(key, value)
                 elif attr_def.datatype == Datatype.longextended:
-                    key, value, modifier = decode_longextended(
-                        key, value, offset
-                    )
+                    key, value, modifier = decode_longextended(key, value)
                 elif attr_def.datatype == Datatype.evs:
                     # Shouldn't this be part of extended/longextended?
                     key, value, modifier = decode_evs(key, value, offset)
@@ -130,7 +128,7 @@ def pre_decode_attributes(  # pylint: disable=too-many-branches
                     key, value, modifier = decode_concat(key, value, offset)
                 else:
                     modifier = 2
-                    # Redundand in the "normal" case
+                    # Redundant in the "normal" case
                 tmp_attributes = [(key, value, offset + modifier)]
         except (KeyError, IndexError):
             # We do not know the TLV, but the packet seems to be well-formed so far
@@ -227,21 +225,17 @@ def decode_vsa(
     return vendor_attributes
 
 
-def decode_extended(
-    key: int, value: bytes, offset: int
-) -> SpecialTlvDescription:
+def decode_extended(key: int, value: bytes) -> SpecialTlvDescription:
     """Decode an Attribute of type extended"""
     key = (key, value[0])
-    value = value[1 : length - 2]
+    value = value[1:-2]
     return (key, value, 3)
 
 
-def decode_longextended(
-    key: int, value: bytes, offset: int
-) -> SpecialTlvDescription:
+def decode_longextended(key: int, value: bytes) -> SpecialTlvDescription:
     """Decode an Attribute of type long-extended"""
     key = (key, value[0])
-    value = value[2 : length - 3]
+    value = value[2:-3]
     return (key, value, 4)