diff --git a/tools/ida_scripts/vtable_dump.py b/tools/ida_scripts/vtable_dump.py
index 1f5bd52e..b44efd59 100644
--- a/tools/ida_scripts/vtable_dump.py
+++ b/tools/ida_scripts/vtable_dump.py
@@ -42,8 +42,8 @@ innerclass = ""
 classname = None
 offsetdata = {}
 
-# Detect address size based on ScreenEA object
-adr_size = (sys.getsizeof(ScreenEA()) - 8)
+# Detect address size
+adr_size = 8 if __EA64__ else 4
 
 def ExtractTypeInfo(ea, level = 0):
 	global catchclass