diff --git a/7.3.802 b/7.3.802
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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.802
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.802
+Problem:    After setting 'isk' to a value ending in a comma appending to the
+	    option fails.
+Solution:   Disallow a trailing comma for 'isk' and similar options.
+Files:	    src/charset.c
+
+
+*** ../vim-7.3.801/src/charset.c	2013-01-30 17:30:14.000000000 +0100
+--- src/charset.c	2013-02-06 16:20:01.000000000 +0100
+***************
+*** 284,290 ****
+--- 284,295 ----
+  		}
+  		++c;
+  	    }
++ 
++ 	    c = *p;
+  	    p = skip_to_option_part(p);
++ 	    if (c == ',' && *p == NUL)
++ 		/* Trailing comma is not allowed. */
++ 		return FAIL;
+  	}
+      }
+      chartab_initialized = TRUE;
+*** ../vim-7.3.801/src/version.c	2013-02-06 13:37:58.000000000 +0100
+--- src/version.c	2013-02-06 16:21:18.000000000 +0100
+***************
+*** 727,728 ****
+--- 727,730 ----
+  {   /* Add new patch number below this line */
++ /**/
++     802,
+  /**/
+
+-- 
+Dreams are free, but there's a small charge for alterations.
+
+ /// 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    ///