diff --git a/CHANGES b/CHANGES
index f4c01dee..a4001560 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,7 @@
 20 November 2007
 
+* Fix format string error with "must specify a client" message. Also
+  sprinkle some printflike tags.
 * tmux 0.1 released.
 
 17 November 2007
@@ -231,4 +233,4 @@
   (including mutt, emacs). No status bar yet and no key remapping or other
   customisation.
 
-$Id: CHANGES,v 1.74 2007-11-20 17:01:38 nicm Exp $
+$Id: CHANGES,v 1.75 2007-11-20 18:11:37 nicm Exp $
diff --git a/key-bindings.c b/key-bindings.c
index 6f165eaa..7be5df60 100644
--- a/key-bindings.c
+++ b/key-bindings.c
@@ -1,4 +1,4 @@
-/* $Id: key-bindings.c,v 1.15 2007-11-16 22:06:45 nicm Exp $ */
+/* $Id: key-bindings.c,v 1.16 2007-11-20 18:11:37 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -26,8 +26,8 @@
 
 struct bindings	key_bindings;
 
-void	key_bindings_error(struct cmd_ctx *, const char *, ...);
-void	key_bindings_print(struct cmd_ctx *, const char *, ...);
+void printflike2 key_bindings_error(struct cmd_ctx *, const char *, ...);
+void printflike2 key_bindings_print(struct cmd_ctx *, const char *, ...);
 
 void
 key_bindings_add(int key, struct cmd *cmd)
@@ -141,7 +141,7 @@ key_bindings_free(void)
 	ARRAY_FREE(&key_bindings);
 }
 
-void
+void printflike2
 key_bindings_error(struct cmd_ctx *ctx, const char *fmt, ...)
 {
 	va_list	ap;
@@ -152,11 +152,11 @@ key_bindings_error(struct cmd_ctx *ctx, const char *fmt, ...)
 	va_end(ap);
 
 	*msg = toupper((u_char) *msg);
-	server_write_message(ctx->client, msg);
+	server_write_message(ctx->client, "%s", msg);
 	xfree(msg);
 }
 
-void
+void printflike2
 key_bindings_print(struct cmd_ctx *ctx, const char *fmt, ...)
 {
 	static u_int	 line;
diff --git a/server-fn.c b/server-fn.c
index a04b181c..68ebc374 100644
--- a/server-fn.c
+++ b/server-fn.c
@@ -1,4 +1,4 @@
-/* $Id: server-fn.c,v 1.24 2007-10-30 10:59:43 nicm Exp $ */
+/* $Id: server-fn.c,v 1.25 2007-11-20 18:11:37 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -327,7 +327,7 @@ server_status_window_all(struct window *w)
 	}
 }
 
-void
+void printflike2
 server_write_message(struct client *c, const char *fmt, ...)
 {
 	struct screen	*s = &c->session->curw->window->screen;
diff --git a/server-msg.c b/server-msg.c
index 3af04de8..329bfb3e 100644
--- a/server-msg.c
+++ b/server-msg.c
@@ -1,4 +1,4 @@
-/* $Id: server-msg.c,v 1.32 2007-11-16 21:31:03 nicm Exp $ */
+/* $Id: server-msg.c,v 1.33 2007-11-20 18:11:37 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -29,8 +29,10 @@ int	server_msg_fn_identify(struct hdr *, struct client *);
 int	server_msg_fn_keys(struct hdr *, struct client *);
 int	server_msg_fn_resize(struct hdr *, struct client *);
 
-void	server_msg_fn_command_error(struct cmd_ctx *, const char *, ...);
-void	server_msg_fn_command_print(struct cmd_ctx *, const char *, ...);
+void printflike2 server_msg_fn_command_error(
+    	    struct cmd_ctx *, const char *, ...);
+void printflike2 server_msg_fn_command_print(
+    	    struct cmd_ctx *, const char *, ...);
 
 struct server_msg {
 	enum hdrtype	type;
@@ -74,7 +76,7 @@ server_msg_dispatch(struct client *c)
 	}
 }
 
-void
+void printflike2
 server_msg_fn_command_error(struct cmd_ctx *ctx, const char *fmt, ...)
 {
 	va_list	ap;
@@ -88,7 +90,7 @@ server_msg_fn_command_error(struct cmd_ctx *ctx, const char *fmt, ...)
 	xfree(msg);
 }
 
-void
+void printflike2
 server_msg_fn_command_print(struct cmd_ctx *ctx, const char *fmt, ...)
 {
 	va_list	ap;
@@ -144,7 +146,7 @@ server_msg_fn_command(struct hdr *hdr, struct client *c)
 	} else {
 		if (client == NULL) {
 			server_msg_fn_command_error(&ctx, 
-			    "%s: must specify a client: %s", cmd->entry->name);
+			    "%s: must specify a client", cmd->entry->name);
 			goto out;
 		}
 		for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
diff --git a/status.c b/status.c
index ad0ef1b2..90a2363e 100644
--- a/status.c
+++ b/status.c
@@ -1,4 +1,4 @@
-/* $Id: status.c,v 1.8 2007-10-30 10:59:43 nicm Exp $ */
+/* $Id: status.c,v 1.9 2007-11-20 18:11:37 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -22,7 +22,7 @@
 
 #include "tmux.h"
 
-void	status_print(struct buffer *, size_t *, const char *, ...);
+void printflike3 status_print(struct buffer *, size_t *, const char *, ...);
 
 void
 status_write(struct client *c)
@@ -61,7 +61,7 @@ status_write(struct client *c)
 		input_store_zero(b, CODE_CURSORON);
 }
 
-void
+void printflike3
 status_print(struct buffer *b, size_t *size, const char *fmt, ...)
 {
 	va_list	ap;
diff --git a/tmux.h b/tmux.h
index 289fa582..ebbc37cd 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.81 2007-11-16 21:31:03 nicm Exp $ */
+/* $Id: tmux.h,v 1.82 2007-11-20 18:11:37 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -653,7 +653,7 @@ void	 server_clear_window_cur(struct window *);
 void	 server_clear_window_all(struct window *);
 void	 server_redraw_window_cur(struct window *);
 void	 server_redraw_window_all(struct window *);
-void	 server_write_message(struct client *, const char *, ...);
+void printflike2 server_write_message(struct client *, const char *, ...);
 
 /* status.c */
 void	 status_write(struct client *c);