diff --git a/mesonpy/_tags.py b/mesonpy/_tags.py
index 846f4a684..37fc8411b 100644
--- a/mesonpy/_tags.py
+++ b/mesonpy/_tags.py
@@ -6,6 +6,7 @@
 
 import os
 import platform
+import struct
 import sys
 import sysconfig
 import typing
@@ -25,7 +26,7 @@
 }
 
 
-_32_BIT_INTERPRETER = sys.maxsize <= 2**32
+_32_BIT_INTERPRETER = struct.calcsize('P') == 4
 
 
 def get_interpreter_tag() -> str: