diff --git a/cmd-server-info.c b/cmd-server-info.c
index 396d15b0..daa08572 100644
--- a/cmd-server-info.c
+++ b/cmd-server-info.c
@@ -81,7 +81,7 @@ cmd_server_info_exec(unused struct cmd *self, struct cmd_ctx *ctx)
 	ctx->print(ctx, "protocol version is %d", PROTOCOL_VERSION);
 	ctx->print(ctx, "%u clients, %u sessions",
 	    ARRAY_LENGTH(&clients), ARRAY_LENGTH(&sessions));
-	ctx->print(ctx, "");
+	ctx->print(ctx, "%s", "");
 
 	ctx->print(ctx, "Clients:");
 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
@@ -94,7 +94,7 @@ cmd_server_info_exec(unused struct cmd *self, struct cmd_ctx *ctx)
 		    c->session->name, c->tty.sx, c->tty.sy, c->tty.termname,
 		    c->flags, c->tty.flags);
 	}
-	ctx->print(ctx, "");
+	ctx->print(ctx, "%s", "");
 
  	ctx->print(ctx, "Sessions: [%zu/%zu]",
 	    sizeof (struct grid_cell), sizeof (struct grid_utf8));
@@ -142,7 +142,7 @@ cmd_server_info_exec(unused struct cmd *self, struct cmd_ctx *ctx)
 			}
 		}
 	}
-	ctx->print(ctx, "");
+	ctx->print(ctx, "%s", "");
 
   	ctx->print(ctx, "Terminals:");
 	SLIST_FOREACH(term, &tty_terms, entry) {
@@ -174,7 +174,7 @@ cmd_server_info_exec(unused struct cmd *self, struct cmd_ctx *ctx)
 			}
 		}
 	}
-	ctx->print(ctx, "");
+	ctx->print(ctx, "%s", "");
 
 	return (0);
 }
diff --git a/cmd-show-buffer.c b/cmd-show-buffer.c
index 0b525695..8972f098 100644
--- a/cmd-show-buffer.c
+++ b/cmd-show-buffer.c
@@ -94,7 +94,7 @@ cmd_show_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
 	
 	if (len != 0) {
 		buf[len] = '\0';
-		ctx->print(ctx, buf);
+		ctx->print(ctx, "%s", buf);
 	}
 	xfree(buf);
 
diff --git a/tmux.h b/tmux.h
index 4ba1cec4..4aa844b8 100644
--- a/tmux.h
+++ b/tmux.h
@@ -991,9 +991,9 @@ struct cmd_ctx {
 
 	struct msg_command_data	*msgdata;
 
-	void		(*print)(struct cmd_ctx *, const char *, ...);
-	void		(*info)(struct cmd_ctx *, const char *, ...);
-	void		(*error)(struct cmd_ctx *, const char *, ...);
+	void printflike2 (*print)(struct cmd_ctx *, const char *, ...);
+	void printflike2 (*info)(struct cmd_ctx *, const char *, ...);
+	void printflike2 (*error)(struct cmd_ctx *, const char *, ...);
 };
 
 struct cmd {
@@ -1722,8 +1722,8 @@ void printflike1 log_warnx(const char *, ...);
 void printflike1 log_info(const char *, ...);
 void printflike1 log_debug(const char *, ...);
 void printflike1 log_debug2(const char *, ...);
-__dead void	 log_fatal(const char *, ...);
-__dead void	 log_fatalx(const char *, ...);
+__dead void printflike1 log_fatal(const char *, ...);
+__dead void printflike1 log_fatalx(const char *, ...);
 
 /* xmalloc.c */
 char		*xstrdup(const char *);