diff --git a/7.3.156 b/7.3.156
new file mode 100644
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@@ -0,0 +1,89 @@
+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.156
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.156
+Problem:    Tty names possibly left unterminated.
+Solution:   Use vim_strncpy() instead of strncpy().
+Files:	    src/pty.c
+
+
+*** ../vim-7.3.155/src/pty.c	2010-08-15 21:57:28.000000000 +0200
+--- src/pty.c	2011-04-11 14:02:49.000000000 +0200
+***************
+*** 209,216 ****
+  #ifdef _SEQUENT_
+      fvhangup(s);
+  #endif
+!     strncpy(PtyName, m, sizeof(PtyName));
+!     strncpy(TtyName, s, sizeof(TtyName));
+      initmaster(f);
+      *ttyn = TtyName;
+      return f;
+--- 209,216 ----
+  #ifdef _SEQUENT_
+      fvhangup(s);
+  #endif
+!     vim_strncpy((char_u *)PtyName, (char_u *)m, sizeof(PtyName) - 1);
+!     vim_strncpy((char_u *)TtyName, (char_u *)s, sizeof(TtyName) - 1);
+      initmaster(f);
+      *ttyn = TtyName;
+      return f;
+***************
+*** 301,307 ****
+  	return -1;
+      }
+      signal(SIGCHLD, sigcld);
+!     strncpy(TtyName, m, sizeof(TtyName));
+      initmaster(f);
+      *ttyn = TtyName;
+      return f;
+--- 301,307 ----
+  	return -1;
+      }
+      signal(SIGCHLD, sigcld);
+!     vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1);
+      initmaster(f);
+      *ttyn = TtyName;
+      return f;
+***************
+*** 326,332 ****
+      /* a dumb looking loop replaced by mycrofts code: */
+      if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_EXTRA)) < 0)
+  	return -1;
+!     strncpy(TtyName, ttyname(f), sizeof(TtyName));
+      if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK))
+      {
+  	close(f);
+--- 326,332 ----
+      /* a dumb looking loop replaced by mycrofts code: */
+      if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_EXTRA)) < 0)
+  	return -1;
+!     vim_strncpy((char_u *)TtyName, (char_u *)ttyname(f), sizeof(TtyName) - 1);
+      if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK))
+      {
+  	close(f);
+*** ../vim-7.3.155/src/version.c	2011-04-11 13:46:07.000000000 +0200
+--- src/version.c	2011-04-11 14:23:38.000000000 +0200
+***************
+*** 716,717 ****
+--- 716,719 ----
+  {   /* Add new patch number below this line */
++ /**/
++     156,
+  /**/
+
+-- 
+I think that you'll agree that engineers are very effective in their social
+interactions.  It's the "normal" people who are nuts.
+				(Scott Adams - The Dilbert principle)
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///