diff -Naur xhomer-2-19-24/term_x11.c xhomer-2-19-24-bugfix/term_x11.c
--- xhomer-2-19-24/term_x11.c	2003-12-13 19:06:36.000000000 +0300
+++ xhomer-2-19-24-bugfix/term_x11.c	2024-12-17 17:50:57.178452712 +0300
@@ -99,6 +99,9 @@
 LOCAL int		pro_keyboard_fifo_t;		/* FIFO tail pointer */
 LOCAL int		pro_keyboard_fifo[PRO_KEYBOARD_FIFO_DEPTH];
 
+/* This is used so we can close out properly. */
+LOCAL Atom wm_delete_window;
+
 int			pro_mouse_x = 0;		/* mouse x */
 int			pro_mouse_y = 0;		/* mouse y */
 int			pro_mouse_l = 0;		/* left mouse button */
@@ -794,6 +797,9 @@
 
 	  XMapWindow (ProDisplay, ProWindow);
 
+	  wm_delete_window = XInternAtom(ProDisplay, "WM_DELETE_WINDOW", False);
+	  XSetWMProtocols(ProDisplay, ProWindow, &wm_delete_window, 1);
+
 	  /* Wait for window to become visible */
 	  /* XXX #9 server sometimes hangs here with no events */
 
@@ -1783,6 +1789,14 @@
 int		eventtype;
 
 
+	/* If we receive a WM_DELETE_WINDOW, close gracefully */
+
+	while (XCheckTypedWindowEvent(ProDisplay, ProWindow, ClientMessage, &event)) {
+              	if ((Atom)event.xclient.data.l[0] == wm_delete_window) {
+                	pro_exit();
+              	}
+	}
+
 	/* If multiple events are buffered up, flush them all out */
 
 	/* XXX bug workaround */