--- rxvt-unicode/src/screen.C	2005/12/21 23:57:12	1.187
+++ rxvt-unicode/src/screen.C	2005/12/22 00:07:47	1.188
@@ -489,7 +489,7 @@
     {
       num_scr = 0;
 
-      for (int i = nrow; i--; )
+      for (int i = prev_nrow; i--; )
         ::swap (ROW(i), swap_buf [i]);
 
       ::swap (screen.charset, swap.charset);