diff -r 7b02d596fa11 config.def.h
--- a/config.def.h	Mon Dec 21 01:16:59 2009 -0500
+++ b/config.def.h	Mon Dec 21 01:18:51 2009 -0500
@@ -8,6 +8,7 @@
 static const char selbordercolor[]  = "#0066ff";
 static const char selbgcolor[]      = "#0066ff";
 static const char selfgcolor[]      = "#ffffff";
+static const char urgbordercolor[]  = "#ff0000";
 static const unsigned int borderpx  = 1;        /* border pixel of windows */
 static const unsigned int snap      = 32;       /* snap pixel */
 static const Bool showbar           = True;     /* False means no bar */
diff -r 7b02d596fa11 dwm.c
--- a/dwm.c	Mon Dec 21 01:16:59 2009 -0500
+++ b/dwm.c	Mon Dec 21 01:18:51 2009 -0500
@@ -97,6 +97,7 @@
 	int x, y, w, h;
 	unsigned long norm[ColLast];
 	unsigned long sel[ColLast];
+	unsigned long urg[ColLast];
 	Drawable drawable;
 	GC gc;
 	struct {
@@ -1504,6 +1505,9 @@
 	dc.sel[ColBorder] = getcolor(selbordercolor);
 	dc.sel[ColBG] = getcolor(selbgcolor);
 	dc.sel[ColFG] = getcolor(selfgcolor);
+	dc.urg[ColBorder] = getcolor(urgbordercolor);
+	dc.urg[ColBG] = getcolor(selbgcolor);
+	dc.urg[ColFG] = getcolor(selfgcolor);
 	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
 	dc.gc = XCreateGC(dpy, root, 0, NULL);
 	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
@@ -1904,8 +1908,11 @@
 			wmh->flags &= ~XUrgencyHint;
 			XSetWMHints(dpy, c->win, wmh);
 		}
-		else
+		else {
 			c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
+			if (c->isurgent)
+				XSetWindowBorder(dpy, c->win, dc.urg[ColBorder]);
+		}
 		XFree(wmh);
 	}
 }