--- src/pilot-memos.c	2009-06-04 15:26:19.000000000 +0200
+++ src/pilot-memos.c	2016-12-20 15:20:12.137836228 +0100
@@ -113,7 +113,7 @@
 	mkdir(dirname, 0700);
 
 	/* Create a directory for the category */
-	strncat(pathbuffer, dirname, MAXDIRNAMELEN);
+	strncat(pathbuffer, dirname, MAXDIRNAMELEN-2);
 	strncat(pathbuffer, "/", 1);
 
 	/* Should make sure category doesn't have slashes in it */
