diff -Nru libde265-1.0.15/debian/changelog libde265-1.0.15/debian/changelog
--- libde265-1.0.15/debian/changelog	2023-12-21 08:02:23.000000000 +0000
+++ libde265-1.0.15/debian/changelog	2023-12-21 08:41:49.000000000 +0000
@@ -1,3 +1,9 @@
+libde265 (1.0.15-1~ppa1~ubuntu22.04.1) unstable; urgency=medium
+
+  * Add patch to fix "Libs.private" in libde265.pc.
+
+ -- Joachim Bauch <bauch@struktur.de>  Thu, 21 Dec 2023 09:41:49 +0100
+
 libde265 (1.0.15-1~ppa1~ubuntu22.04) unstable; urgency=medium
 
   * New upstream version 1.0.15
diff -Nru libde265-1.0.15/debian/patches/fix-private-libs-pc.patch libde265-1.0.15/debian/patches/fix-private-libs-pc.patch
--- libde265-1.0.15/debian/patches/fix-private-libs-pc.patch	1970-01-01 00:00:00.000000000 +0000
+++ libde265-1.0.15/debian/patches/fix-private-libs-pc.patch	2023-12-21 08:41:46.000000000 +0000
@@ -0,0 +1,26 @@
+Description: Fix missing "LIBS_PRIVATE" variable for libde265.pc in
+ autoconf builds.
+From 56d1cf52e43d734692721c99b72815c0fee1f184 Mon Sep 17 00:00:00 2001
+From: Joachim Bauch <bauch@struktur.de>
+Date: Thu, 21 Dec 2023 09:22:58 +0100
+Subject: [PATCH] Fix missing "LIBS_PRIVATE" for libde265.pc in autoconf
+ builds.
+Forwarded: https://github.com/strukturag/libde265/pull/439
+---
+ configure.ac | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/configure.ac b/configure.ac
+index 770f5025..798e9a2c 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -104,6 +104,9 @@ AC_FUNC_ERROR_AT_LINE
+ # AC_FUNC_REALLOC
+ AC_FUNC_MKTIME
+ 
++LIBS_PRIVATE="$LIBS -lstdc++"
++AC_SUBST(LIBS_PRIVATE)
++
+ AM_CONDITIONAL(MINGW, expr $host : '.*-mingw' >/dev/null 2>&1)
+ 
+ # Check if "__STRICT_ANSI__" is required.
diff -Nru libde265-1.0.15/debian/patches/series libde265-1.0.15/debian/patches/series
--- libde265-1.0.15/debian/patches/series	2020-12-16 15:06:51.000000000 +0000
+++ libde265-1.0.15/debian/patches/series	2023-12-21 08:41:46.000000000 +0000
@@ -1,2 +1,3 @@
 only_export_decoder_api.patch
 disable_tools.patch
+fix-private-libs-pc.patch