diff --git a/slither/core/solidity_types/array_type.py b/slither/core/solidity_types/array_type.py
index 9dfd3cf17b..04a458d685 100644
--- a/slither/core/solidity_types/array_type.py
+++ b/slither/core/solidity_types/array_type.py
@@ -74,7 +74,7 @@ def __str__(self) -> str:
     def __eq__(self, other: Any) -> bool:
         if not isinstance(other, ArrayType):
             return False
-        return self._type == other.type and self.length == other.length
+        return self._type == other.type and self._length_value == other.length_value
 
     def __hash__(self) -> int:
         return hash(str(self))