diff -Nru odr-dabmux-5.4.1/debian/changelog odr-dabmux-5.4.1/debian/changelog
--- odr-dabmux-5.4.1/debian/changelog	2025-12-01 19:21:34.000000000 +0100
+++ odr-dabmux-5.4.1/debian/changelog	2026-05-06 02:00:00.000000000 +0200
@@ -1,3 +1,10 @@
+odr-dabmux (5.4.1-1.1) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * Remove deprecated libboost-system-dev from Build-Depends. (Closes: #1135771)
+
+ -- Anton Gladky <gladk@debian.org>  Tue, 06 May 2026 00:00:00 +0000
+
 odr-dabmux (5.4.1-1) unstable; urgency=medium
 
   * New upstream version 5.4.1
diff -Nru odr-dabmux-5.4.1/debian/patches/remove-boost-system odr-dabmux-5.4.1/debian/patches/remove-boost-system
--- odr-dabmux-5.4.1/debian/patches/remove-boost-system	1970-01-01 01:00:00.000000000 +0100
+++ odr-dabmux-5.4.1/debian/patches/remove-boost-system	2026-05-06 02:00:00.000000000 +0200
@@ -0,0 +1,29 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Anton Gladky <gladk@debian.org>
+Date: Tue, 06 May 2026 00:00:00 +0000
+Subject: Remove boost::system dependency
+
+boost::system has been header-only since Boost 1.69 and the separate
+library is no longer needed.
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -39,7 +39,6 @@
+ # Checks for libraries.
+ AX_PTHREAD([], AC_MSG_ERROR([requires pthread]))
+ AX_BOOST_BASE([1.48.0], [], AC_MSG_ERROR([BOOST 1.48 or later is required]))
+-AX_BOOST_SYSTEM
+ 
+ # Checks for header files.
+ AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h stddef.h stdint.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h unistd.h])
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -57,7 +57,7 @@
+ odr_dabmux_CFLAGS   =-Wall $(INCLUDE) $(PTHREAD_CFLAGS) $(GITVERSION_FLAGS)
+ odr_dabmux_CXXFLAGS =-Wall $(PTHREAD_CXXFLAGS) $(INCLUDE) $(GITVERSION_FLAGS) $(BOOST_CPPFLAGS) $(ZMQ_CPPFLAGS)
+ odr_dabmux_LDADD    =$(ZMQ_LIBS) $(BOOST_LDFLAGS) \
+-					 $(PTHREAD_CFLAGS) $(PTHREAD_LIBS) $(BOOST_SYSTEM_LIB)
++					 $(PTHREAD_CFLAGS) $(PTHREAD_LIBS)
+ 
+ odr_dabmux_SOURCES  =src/DabMux.cpp \
+ 					 src/DabMultiplexer.cpp \
diff -Nru odr-dabmux-5.4.1/debian/patches/series odr-dabmux-5.4.1/debian/patches/series
--- odr-dabmux-5.4.1/debian/patches/series	2025-11-30 19:18:29.000000000 +0100
+++ odr-dabmux-5.4.1/debian/patches/series	2026-05-06 02:00:00.000000000 +0200
@@ -1 +1,2 @@
 # You must remove unused comment lines for the released package.
+remove-boost-system