diff --git a/srcpkgs/mkvtoolnix/patches/8383780e4ad9bc3e475f06e9485486b8b7d993d3.patch b/srcpkgs/mkvtoolnix/patches/8383780e4ad9bc3e475f06e9485486b8b7d993d3.patch
new file mode 100644
index 00000000000..eae629818cf
--- /dev/null
+++ b/srcpkgs/mkvtoolnix/patches/8383780e4ad9bc3e475f06e9485486b8b7d993d3.patch
@@ -0,0 +1,75 @@
+From 8383780e4ad9bc3e475f06e9485486b8b7d993d3 Mon Sep 17 00:00:00 2001
+From: Moritz Bunkus <moritz@bunkus.org>
+Date: Sat, 15 Dec 2018 19:20:49 +0100
+Subject: [PATCH] fix compilation with Boost 1.69.0
+
+In 1.69.0 the `boost::tribool` class's `operator bool` was made
+explicit. This means that using a `boost::tribool` as the return value
+in a function returning a `bool` requires an explicit cast.
+
+Fixes #2460.
+---
+ NEWS.md                  | 5 +++++
+ src/common/debugging.h   | 2 +-
+ src/input/r_matroska.cpp | 2 +-
+ src/output/p_avc_es.cpp  | 2 +-
+ 4 files changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/NEWS.md b/NEWS.md
+index dcc24e3e9..94e1ddcec 100644
+--- NEWS.md
++++ NEWS.md
+@@ -5,6 +5,11 @@
+ * MKVToolNix GUI: multiplexer: the predefined split sizes and durations can
+   now be customized in the preferences.
+ 
++## Bug fixes
++
++* source code: fixed compilation with Boost 1.69.0 after API-breaking change
++  to the `boost::tribool` class. Fixes #2460.
++
+ 
+ # Version 29.0.0 "Like It Or Not" 2018-12-01
+ 
+diff --git a/src/common/debugging.h b/src/common/debugging.h
+index 629f07fde..b898e2b72 100644
+--- src/common/debugging.h
++++ src/common/debugging.h
+@@ -57,7 +57,7 @@ class debugging_option_c {
+       if (boost::logic::indeterminate(m_requested))
+         m_requested = debugging_c::requested(m_option);
+ 
+-      return m_requested;
++      return static_cast<bool>(m_requested);
+     }
+   };
+ 
+diff --git a/src/input/r_matroska.cpp b/src/input/r_matroska.cpp
+index 0617d79db..2918b2ea1 100644
+--- src/input/r_matroska.cpp
++++ src/input/r_matroska.cpp
+@@ -1684,7 +1684,7 @@ kax_reader_c::set_packetizer_headers(kax_track_t *t) {
+     PTZR(t->ptzr)->set_track_forced_flag(true);
+ 
+   if (boost::logic::indeterminate(PTZR(t->ptzr)->m_ti.m_enabled_track))
+-    PTZR(t->ptzr)->set_track_enabled_flag(t->enabled_track);
++    PTZR(t->ptzr)->set_track_enabled_flag(static_cast<bool>(t->enabled_track));
+ 
+   if ((0 != t->track_uid) && !PTZR(t->ptzr)->set_uid(t->track_uid))
+     mxwarn(fmt::format(Y("matroska_reader: Could not keep the track UID {0} because it is already allocated for the new file.\n"), t->track_uid));
+diff --git a/src/output/p_avc_es.cpp b/src/output/p_avc_es.cpp
+index becdf81d6..ede163dc3 100644
+--- src/output/p_avc_es.cpp
++++ src/output/p_avc_es.cpp
+@@ -46,7 +46,7 @@ avc_es_video_packetizer_c(generic_reader_c *p_reader,
+   set_codec_id(MKV_V_MPEG4_AVC);
+ 
+   m_parser.set_keep_ar_info(false);
+-  m_parser.set_fix_bitstream_frame_rate(m_ti.m_fix_bitstream_frame_rate);
++  m_parser.set_fix_bitstream_frame_rate(static_cast<bool>(m_ti.m_fix_bitstream_frame_rate));
+ 
+   // If no external timestamp file has been specified then mkvmerge
+   // might have created a factory due to the --default-duration
+-- 
+2.18.1
+
diff --git a/srcpkgs/mkvtoolnix/template b/srcpkgs/mkvtoolnix/template
index 09ec456c8b7..076c78f0247 100644
--- a/srcpkgs/mkvtoolnix/template
+++ b/srcpkgs/mkvtoolnix/template
@@ -1,7 +1,7 @@
 # Template file for 'mkvtoolnix'
 pkgname=mkvtoolnix
 version=29.0.0
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="--with-docbook-xsl-root=/usr/share/xsl/docbook --enable-qt"
 hostmakedepends="autoconf docbook-xsl libxslt pkg-config ruby"