diff -Nru ax25-tools-0.0.10-rc4/debian/changelog ax25-tools-0.0.10-rc4/debian/changelog
--- ax25-tools-0.0.10-rc4/debian/changelog	2015-09-03 14:39:34.000000000 +0100
+++ ax25-tools-0.0.10-rc4/debian/changelog	2017-10-12 20:54:57.000000000 +0100
@@ -1,3 +1,9 @@
+ax25-tools (0.0.10-rc4-1+jrtc27.1) UNRELEASED; urgency=medium
+
+  * Fix segfaults by ensuring ptsname has a prototype.
+
+ -- James Clarke <jrtc27@debian.org>  Thu, 12 Oct 2017 20:54:57 +0100
+
 ax25-tools (0.0.10-rc4-1) unstable; urgency=medium
 
   * New upstream version.
diff -Nru ax25-tools-0.0.10-rc4/debian/patches/02-ptsname-prototype.patch ax25-tools-0.0.10-rc4/debian/patches/02-ptsname-prototype.patch
--- ax25-tools-0.0.10-rc4/debian/patches/02-ptsname-prototype.patch	1970-01-01 01:00:00.000000000 +0100
+++ ax25-tools-0.0.10-rc4/debian/patches/02-ptsname-prototype.patch	2017-10-12 20:54:57.000000000 +0100
@@ -0,0 +1,67 @@
+Binary files a/6pack/.m6pack.c.swp and b/6pack/.m6pack.c.swp differ
+Binary files a/kiss/.kissattach.c.swp and b/kiss/.kissattach.c.swp differ
+Binary files a/kiss/.kissnetd.c.swp and b/kiss/.kissnetd.c.swp differ
+Binary files a/kiss/.mkiss.c.swp and b/kiss/.mkiss.c.swp differ
+Binary files a/kiss/.net2kiss.c.swp and b/kiss/.net2kiss.c.swp differ
+--- a/kiss/kissattach.c
++++ b/kiss/kissattach.c
+@@ -1,5 +1,6 @@
++#define _DEFAULT_SOURCE
++#define _XOPEN_SOURCE 500
+ #include <stdio.h>
+-#define __USE_XOPEN
+ #include <stdlib.h>
+ #include <string.h>
+ #include <unistd.h>
+--- a/kiss/kissnetd.c
++++ b/kiss/kissnetd.c
+@@ -9,8 +9,9 @@
+  * F1OAT 960804 - Frederic RIBLE
+  */
+  
++#define _DEFAULT_SOURCE
++#define _XOPEN_SOURCE 500
+ #include <stdio.h>
+-#define __USE_XOPEN
+ #include <stdlib.h>
+ #include <sys/time.h>
+ #include <sys/types.h>
+--- a/kiss/mkiss.c
++++ b/kiss/mkiss.c
+@@ -37,8 +37,9 @@
+  * 1.08 xx/xx/99 Tom Mazouch - Adjustable poll interval
+  */
+ 
++#define _DEFAULT_SOURCE
++#define _XOPEN_SOURCE 500
+ #include <stdio.h>
+-#define __USE_XOPEN
+ #include <string.h>
+ #include <errno.h>
+ #include <stdlib.h>
+--- a/kiss/net2kiss.c
++++ b/kiss/net2kiss.c
+@@ -30,8 +30,9 @@
+ 
+ /*****************************************************************************/
+ 
++#define _DEFAULT_SOURCE
++#define _XOPEN_SOURCE 500
+ #include <stdio.h>
+-#define __USE_XOPEN
+ #include <stdlib.h>
+ #include <sys/types.h>
+ #include <sys/time.h>
+--- a/6pack/m6pack.c
++++ b/6pack/m6pack.c
+@@ -33,8 +33,9 @@
+  *********************************************************************
+  */
+ 
++#define _DEFAULT_SOURCE
++#define _XOPEN_SOURCE 500
+ #include <stdio.h>
+-#define __USE_XOPEN
+ #include <string.h>
+ #include <errno.h>
+ #include <stdlib.h>
diff -Nru ax25-tools-0.0.10-rc4/debian/patches/series ax25-tools-0.0.10-rc4/debian/patches/series
--- ax25-tools-0.0.10-rc4/debian/patches/series	2015-09-03 14:05:16.000000000 +0100
+++ ax25-tools-0.0.10-rc4/debian/patches/series	2017-10-12 20:54:57.000000000 +0100
@@ -1 +1,2 @@
 01-spelling-fixes.patch
+02-ptsname-prototype.patch