--- rxvt-unicode/src/screen.C	2011/05/30 18:39:04	1.384
+++ rxvt-unicode/src/screen.C	2011/07/06 00:40:10	1.385
@@ -633,6 +633,10 @@
   if (count == 0 || (row1 > row2))
     return 0;
 
+  int rows = row2 - row1 + 1;
+
+  min_it (count, rows);
+
   want_refresh = 1;
   num_scr += count;
 
@@ -734,10 +738,6 @@
       // use a simple and robust scrolling algorithm, this
       // part of scr_scroll_text is not time-critical.
 
-      int rows = row2 - row1 + 1;
-
-      min_it (count, rows);
-
       line_t *temp_buf = row_buf + total_rows;
 
       for (int row = 0; row < rows; row++)