diff -Nru lib2geom-1.2.2/debian/changelog lib2geom-1.2.2/debian/changelog
--- lib2geom-1.2.2/debian/changelog	2023-01-10 08:51:24.000000000 +0800
+++ lib2geom-1.2.2/debian/changelog	2023-09-16 14:52:37.000000000 +0800
@@ -1,3 +1,12 @@
+lib2geom (1.2.2-3.1) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * use -fexcess-precision=fast to compile 2geom (Closes: #1051980)
+    Since gcc-13, excess precision support has been implemented for C++.
+    -fexcess-precision=fast restores previous behavior.
+
+ -- Shengjing Zhu <zhsj@debian.org>  Sat, 16 Sep 2023 14:52:37 +0800
+
 lib2geom (1.2.2-3) unstable; urgency=medium
 
   * Upload to unstable.
diff -Nru lib2geom-1.2.2/debian/patches/0001-use-fexcess-precision-fast-to-compile-2geom.patch lib2geom-1.2.2/debian/patches/0001-use-fexcess-precision-fast-to-compile-2geom.patch
--- lib2geom-1.2.2/debian/patches/0001-use-fexcess-precision-fast-to-compile-2geom.patch	1970-01-01 08:00:00.000000000 +0800
+++ lib2geom-1.2.2/debian/patches/0001-use-fexcess-precision-fast-to-compile-2geom.patch	2023-09-16 14:52:37.000000000 +0800
@@ -0,0 +1,27 @@
+From: Shengjing Zhu <shengjing.zhu@canonical.com>
+Date: Sat, 16 Sep 2023 14:48:23 +0800
+Subject: use -fexcess-precision=fast to compile 2geom
+
+Since gcc-13, excess precision support has been implemented for C++.
+-fexcess-precision=fast restores previous behavior.
+
+Debian-Bug: https://bugs.debian.org/1051980
+---
+ CMakeLists.txt | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index d2b06b9..077d0c8 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -44,6 +44,10 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+     set(2GEOM_STANDALONE TRUE)
+ endif()
+ 
++if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 13)
++    add_compile_options(-fexcess-precision=fast)
++endif()
++
+ option(2GEOM_TESTING "Build tests" "${2GEOM_STANDALONE}")
+ 
+ if (2GEOM_TESTING)
diff -Nru lib2geom-1.2.2/debian/patches/series lib2geom-1.2.2/debian/patches/series
--- lib2geom-1.2.2/debian/patches/series	1970-01-01 08:00:00.000000000 +0800
+++ lib2geom-1.2.2/debian/patches/series	2023-09-16 14:52:37.000000000 +0800
@@ -0,0 +1 @@
+0001-use-fexcess-precision-fast-to-compile-2geom.patch