diff --git a/debian/changelog b/debian/changelog
index 9558816..1fcb36f 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -5,6 +5,7 @@ dvdisaster (0.79.5-2) UNRELEASED; urgency=medium
   * Remove unnecessary calls to dpkg-parsechangelog from debian/rules.
   * debian/watch: Avoid repacking upstream tarballs unnecessarily.
   * Fix more typos in error messages and docs.
+  * Fix FTBFS on Hurd and kFreeBSD.
 
  -- Carlos Maddela <e7appew@gmail.com>  Sat, 05 Aug 2017 20:03:21 +1000
 
diff --git a/debian/patches/30-hurd-kfreebsd-ftbfs.patch b/debian/patches/30-hurd-kfreebsd-ftbfs.patch
new file mode 100644
index 0000000..1c0c37d
--- /dev/null
+++ b/debian/patches/30-hurd-kfreebsd-ftbfs.patch
@@ -0,0 +1,46 @@
+From: Carlos Maddela <e7appew@gmail.com>
+Date: Sun, 6 Aug 2017 02:40:33 +1000
+Subject: Fix FTBFS on Hurd and kFreeBSD.
+
+Description: Fix FTBFS on Hurd and kFreeBSD.
+ Make sure MMAP_FLAGS gets defined.
+Author: Carlos Maddela <e7appew@gmail.com>
+Last-Update: 2017-08-06
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+---
+ rs03-create.c | 19 +++++++++++--------
+ 1 file changed, 11 insertions(+), 8 deletions(-)
+
+diff --git a/rs03-create.c b/rs03-create.c
+index b2c6033..b14e326 100644
+--- a/rs03-create.c
++++ b/rs03-create.c
+@@ -39,16 +39,19 @@
+ #ifdef HAVE_MMAP
+   #include <sys/mman.h>
+ 
+-#ifdef SYS_LINUX
+-  #define MMAP_FLAGS (MAP_SHARED | MAP_POPULATE | MAP_NORESERVE) 
+-#endif
++#if defined(SYS_LINUX)
+ 
+-#ifdef SYS_FREEBSD
+-  #define MMAP_FLAGS (MAP_SHARED | MAP_PREFAULT_READ) 
+-#endif
++  #define MMAP_FLAGS (MAP_SHARED | MAP_POPULATE | MAP_NORESERVE)
++
++#elif defined(SYS_FREEBSD)
++
++  #define MMAP_FLAGS (MAP_SHARED | MAP_PREFAULT_READ)
++
++#else
++
++  /* SYS_NETBSD and others. */
++  #define MMAP_FLAGS (MAP_SHARED)
+ 
+-#ifdef SYS_NETBSD
+-  #define MMAP_FLAGS (MAP_SHARED) 
+ #endif
+ 
+ #endif
diff --git a/debian/patches/series b/debian/patches/series
index afe379c..89700d5 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -21,3 +21,4 @@
 27-allow-opening-in-browser-again.patch
 28-fudge-pdf-doc-ids.patch
 29-fix-more-typos.patch
+30-hurd-kfreebsd-ftbfs.patch