--- rxvt-unicode/src/screen.C	2011/02/06 11:42:28	1.370
+++ rxvt-unicode/src/screen.C	2011/02/09 23:07:18	1.371
@@ -2880,6 +2880,7 @@
 
   incr_buf_size = 0;
   free (incr_buf);
+  incr_buf = 0;
 
   rxvt_warn ("data loss: timeout on INCR selection paste, ignoring.\n");
 }