diff --git a/mythril/laser/ethereum/call.py b/mythril/laser/ethereum/call.py
index 9657fa5a..bc1c360c 100644
--- a/mythril/laser/ethereum/call.py
+++ b/mythril/laser/ethereum/call.py
@@ -200,9 +200,7 @@ def get_call_data(
         memory_size == global_state.environment.calldata.calldatasize
     )
 
-    if (isinstance(uses_entire_calldata, bool) and uses_entire_calldata) or (
-        isinstance(uses_entire_calldata, Bool) and is_true(uses_entire_calldata)
-    ):
+    if is_true(uses_entire_calldata):
         return global_state.environment.calldata
 
     try: