1 files changed, 1 insertions, 1 deletions

diff --git a/manual/plugins/chessbox.tex b/manual/plugins/chessbox.tex
index 316b3604c7..eec7e356d2 100644
--- a/manual/plugins/chessbox.tex
+++ b/manual/plugins/chessbox.tex
@@ -12,7 +12,7 @@ back and forth through the moves of the game. If the menu is invoked while in
 the viewer, the user is allowed to select a new match from the same file or
 quit the game.
 
-``Force play'' while the computer is thinking will cause it to make it's move
+``Force play'' while the computer is thinking will cause it to make its move
 immediately.  If done while it's your turn, the computer will move
 for you and flip the board so that you are playing from the other side.  If you
 want, you can force play an entire game and watch the artificial intelligence