diff --git a/backport-typo-in-optimization-annotation.patch b/backport-typo-in-optimization-annotation.patch
new file mode 100644
index 0000000000000000000000000000000000000000..7601e38a633f119e679e054e0f1a312ae15d8957
--- /dev/null
+++ b/backport-typo-in-optimization-annotation.patch
@@ -0,0 +1,24 @@
+From ed7f9760db1aa5a6e404441d759642d05cfb9a17 Mon Sep 17 00:00:00 2001
+From: lizhuo <lizhuo@xfusion.com>
+Date: Thu, 17 Apr 2025 17:33:28 +0800
+Subject: [PATCH] typo-in-optimization-annotation
+
+---
+ src/csexp.ml | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/csexp.ml b/src/csexp.ml
+index 78bfa2b..2b2270d 100644
+--- a/src/csexp.ml
++++ b/src/csexp.ml
+@@ -233,7 +233,7 @@ module Make (Sexp : Sexp) = struct
+       match Stack.add_token x stack with
+       | exception Parse_error msg -> Error (pos, msg)
+       | stack -> k s (pos + 1) len lexer stack)
+-    [@@inlined always]
++    [@@inline always]
+
+   let parse_string =
+     let rec loop s pos len lexer stack =
+--
+2.33.0
\ No newline at end of file
diff --git a/ocaml-csexp.spec b/ocaml-csexp.spec
index ba4d3c017083e3104c0bf1441382a9a13f0aa0fa..6d6ec1be0d5283e79dd68fd7ed5954b409c02a14 100644
--- a/ocaml-csexp.spec
+++ b/ocaml-csexp.spec
@@ -6,13 +6,15 @@
 
 Name:           ocaml-csexp
 Version:        1.5.2
-Release:        1
+Release:        2
 Summary:        Parsing and printing of S-expressions in canonical form
 
 License:        MIT
 URL:            https://github.com/ocaml-dune/csexp
 Source0:        https://github.com/ocaml-dune/csexp/releases/download/%{version}/csexp-%{version}.tbz
 
+Patch0001:      backport-typo-in-optimization-annotation.patch
+
 BuildRequires:  ocaml >= 4.03.0
 %if %{with dune}
 BuildRequires:  ocaml-dune >= 1.11
@@ -34,6 +36,7 @@ developing applications that use %{name}.
 
 %prep
 %autosetup -N -n csexp-%{version}
+%patch0001 -p1
 
 %build
 %if %{with dune}
@@ -135,6 +138,9 @@ EOF
 %{_libdir}/ocaml/csexp/*.mli
 
 %changelog
+* Thu Apr 17 2025 lizhuo <lizhuo@xfusion.com> - 1.5.2-2
+- typo in optimization annotation
+
 * Mon Jul 17 2023 niuyaru <niuyaru@kylinos.cn> - 1.5.2-1
 - Update package to version 1.5.2