--- rxvt-unicode/src/screen.C	2022/08/05 07:54:11	1.466
+++ rxvt-unicode/src/screen.C	2022/08/08 09:45:06	1.467
@@ -334,12 +334,12 @@
 
               int qlines = max (0, (llen - 1) / ncol) + 1;
 
-              q -= qlines;
-
               // drop partial lines completely
-              if (q < 0)
+              if (q < qlines)
                 break;
 
+              q -= qlines;
+
               int lofs = 0;
               line_t *qline;