From f9f7a0ab5b23508cf3ccbba744476f289b4db9ce Mon Sep 17 00:00:00 2001
From: Turiiya <34311583+ttytm@users.noreply.github.com>
Date: Fri, 6 Oct 2023 04:11:52 +0200
Subject: [PATCH] cgen: don't subtract null ptr in `__offsetof`

---
 vlib/v/gen/c/cheaders.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vlib/v/gen/c/cheaders.v b/vlib/v/gen/c/cheaders.v
index 47ca63cf58cc49..fe8c68c4698a55 100644
--- a/vlib/v/gen/c/cheaders.v
+++ b/vlib/v/gen/c/cheaders.v
@@ -360,7 +360,7 @@ const c_common_macros = '
 
 // for __offset_of
 #ifndef __offsetof
-	#define __offsetof(PTYPE,FIELDNAME) ((size_t)((char *)&((PTYPE *)0)->FIELDNAME - (char *)0))
+	#define __offsetof(PTYPE,FIELDNAME) ((size_t)(&((PTYPE *)0)->FIELDNAME))
 #endif
 
 #define OPTION_CAST(x) (x)