1Index: src/ex_cmds.c
2===================================================================
3--- src/ex_cmds.c	(revision 57778)
4+++ src/ex_cmds.c	(working copy)
5@@ -4069,7 +4069,7 @@
6     if (eap->forceit)
7 	bigness = curwin->w_height;
8     else if (firstwin == lastwin)
9-	bigness = curwin->w_p_scr * 2;
10+	bigness = p_window_unix2003 ? p_window_unix2003 : curwin->w_p_scr * 2;
11 #ifdef FEAT_WINDOWS
12     else
13 	bigness = curwin->w_height - 3;
14