diff --git a/cmd-split-window.c b/cmd-split-window.c
index a7bb513e..b0498c99 100644
--- a/cmd-split-window.c
+++ b/cmd-split-window.c
@@ -1,4 +1,4 @@
-/* $Id: cmd-split-window.c,v 1.32 2010-01-08 16:23:38 tcunha Exp $ */
+/* $Id: cmd-split-window.c,v 1.33 2010-01-08 16:24:21 tcunha Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -182,9 +182,9 @@ cmd_split_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		size = data->size;
 	else if (data->percentage != -1) {
 		if (type == LAYOUT_TOPBOTTOM)
-			size = (w->active->sy * data->percentage) / 100;
+			size = (wp->sy * data->percentage) / 100;
 		else
-			size = (w->active->sx * data->percentage) / 100;
+			size = (wp->sx * data->percentage) / 100;
 	}
 	hlimit = options_get_number(&s->options, "history-limit");