diff --git a/cmd-choose-client.c b/cmd-choose-client.c
index 96bf6bad..39a77c88 100644
--- a/cmd-choose-client.c
+++ b/cmd-choose-client.c
@@ -1,4 +1,4 @@
-/* $Id: cmd-choose-client.c,v 1.1 2009-08-25 13:53:39 tcunha Exp $ */
+/* $Id: cmd-choose-client.c,v 1.2 2009-08-25 13:55:29 tcunha Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -18,6 +18,8 @@
 
 #include <sys/types.h>
 
+#include <ctype.h>
+
 #include "tmux.h"
 
 /*
diff --git a/cmd-choose-session.c b/cmd-choose-session.c
index 3d62281f..9188d402 100644
--- a/cmd-choose-session.c
+++ b/cmd-choose-session.c
@@ -1,4 +1,4 @@
-/* $Id: cmd-choose-session.c,v 1.11 2009-08-25 13:53:39 tcunha Exp $ */
+/* $Id: cmd-choose-session.c,v 1.12 2009-08-25 13:55:29 tcunha Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -18,6 +18,8 @@
 
 #include <sys/types.h>
 
+#include <ctype.h>
+
 #include "tmux.h"
 
 /*
diff --git a/cmd-choose-window.c b/cmd-choose-window.c
index ec30984f..76387147 100644
--- a/cmd-choose-window.c
+++ b/cmd-choose-window.c
@@ -1,4 +1,4 @@
-/* $Id: cmd-choose-window.c,v 1.15 2009-08-25 13:53:39 tcunha Exp $ */
+/* $Id: cmd-choose-window.c,v 1.16 2009-08-25 13:55:29 tcunha Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -18,6 +18,8 @@
 
 #include <sys/types.h>
 
+#include <ctype.h>
+
 #include "tmux.h"
 
 /*