From 010dcf85567ee1898706a4a8e353ac915a3d8873 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 25 Dec 2025 21:14:35 +0900
Subject: Development of 4.1.0 started.

---
 include/ruby/internal/abi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'include/ruby/internal')

diff --git a/include/ruby/internal/abi.h b/include/ruby/internal/abi.h
index e6d1fa7e8f..e735a67564 100644
--- a/include/ruby/internal/abi.h
+++ b/include/ruby/internal/abi.h
@@ -24,7 +24,7 @@
  * In released versions of Ruby, this number is not defined since teeny
  * versions of Ruby should guarantee ABI compatibility.
  */
-#define RUBY_ABI_VERSION 1
+#define RUBY_ABI_VERSION 0
 
 /* Windows does not support weak symbols so ruby_abi_version will not exist
  * in the shared library. */
-- 
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