diff --git a/dwm.c b/dwm.c
index 670afbe..78ddec9 100644
--- a/dwm.c
+++ b/dwm.c
@@ -96,7 +96,7 @@ struct Client {
 };
 
 typedef struct {
-	int x, y, w, h;
+	int x, y, w, h, dw;
 	unsigned long norm[ColLast];
 	unsigned long sel[ColLast];
 	Drawable drawable;
@@ -554,7 +554,7 @@ configurenotify(XEvent *e) {
 		if(updategeom()) {
 			if(dc.drawable != 0)
 				XFreePixmap(dpy, dc.drawable);
-			dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
+			dc.drawable = XCreatePixmap(dpy, root, dc.dw, bh, DefaultDepth(dpy, screen));
 			updatebars();
 			for(m = mons; m; m = m->next)
 				XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
@@ -1550,7 +1550,7 @@ setup(void) {
 	dc.sel[ColBorder] = getcolor(selbordercolor);
 	dc.sel[ColBG] = getcolor(selbgcolor);
 	dc.sel[ColFG] = getcolor(selfgcolor);
-	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
+	dc.drawable = XCreatePixmap(dpy, root, dc.dw, bh, DefaultDepth(dpy, screen));
 	dc.gc = XCreateGC(dpy, root, 0, NULL);
 	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 	if(!dc.font.set)
@@ -1796,9 +1796,14 @@ updategeom(void) {
 		/* only consider unique geometries as separate screens */
 		if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
 			die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
+		dc.dw = 0;
 		for(i = 0, j = 0; i < nn; i++)
-			if(isuniquegeom(unique, j, &info[i]))
-				memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
+			if(isuniquegeom(unique, j, &info[i])) {
+				memcpy(&unique[j], &info[i], sizeof(XineramaScreenInfo));
+				if(unique[j].width > dc.dw)
+					dc.dw = unique[j].width;
+				++j;
+			}
 		XFree(info);
 		nn = j;
 		if(n <= nn) {
@@ -1850,6 +1855,7 @@ updategeom(void) {
 			mons = createmon();
 		if(mons->mw != sw || mons->mh != sh) {
 			dirty = True;
+			dc.dw = sw;
 			mons->mw = mons->ww = sw;
 			mons->mh = mons->wh = sh;
 			updatebarpos(mons);