--- xterm-179.org/main.c	2004-02-01 02:25:42.000000000 +0900
+++ xterm-179/main.c	2004-02-01 02:32:38.000000000 +0900
@@ -1996,6 +1996,9 @@
 
     screen = &term->screen;
 
+    /* default mouse background color is window background */
+    screen->mousecolorback = term->core.background_pixel;
+
     inhibit = 0;
 #ifdef ALLOWLOGGING
     if (term->misc.logInhibit)