2 files changed, 3 insertions, 2 deletions
diff --git a/HISTORY b/HISTORY
index 2e99f23..5326ae1 100644
--- a/HISTORY
+++ b/HISTORY
@@ -29,3 +29,4 @@ ____-__-__: Version _._._
 - Fixed compiler warnings with gcc-4.1.2.
 - Updated FSF address in the license information.
 - Improved copyright and license information in the header of all source files.
+- Fixed (un)marking the cell on the bottom right.
diff --git a/puzzle.cpp b/puzzle.cpp
index 1f8ea18..9a140f8 100644
--- a/puzzle.cpp
+++ b/puzzle.cpp
@@ -17,7 +17,7 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
- * $Id: puzzle.cpp 106 2007-12-03 23:28:24Z tom $
+ * $Id: puzzle.cpp 107 2008-01-06 15:50:41Z tom $
  */
 
 #include "puzzle.h"
@@ -209,7 +209,7 @@ bool Puzzle::marked(Pos pos) const
 /** Toggle the mark for this cell. */
 void Puzzle::toggle_mark(Pos pos)
 {
-  assert (pos < Pos::last());
+  assert(pos <= Pos::last());
   marks[pos] = !marks[pos];
 }