diff --git a/slither/tools/read_storage/read_storage.py b/slither/tools/read_storage/read_storage.py
index 3ccada844..9ba1e867f 100644
--- a/slither/tools/read_storage/read_storage.py
+++ b/slither/tools/read_storage/read_storage.py
@@ -397,7 +397,7 @@ def get_all_storage_variables(self, func: Callable = lambda x: x) -> None:
         """
         for contract in self.contracts:
             for var in contract.state_variables_ordered:
-                if func(var):
+                if func((contract, var)):
                     if var.is_stored:
                         self._target_variables.append((contract, var))
                     elif (