--- dmenu.c
+++ dmenu.c
@@ -644,11 +654,10 @@ setup(void)
 		if (!XGetWindowAttributes(dpy, parentwin, &wa))
 			die("could not get embedding window attributes: 0x%lx",
 			    parentwin);
-		x = 0;
-		y = topbar ? 0 : wa.height - mh;
-		mw = wa.width;
+		mw = MIN(MAX(max_textw() + promptw, 100), wa.width);
+		x = (wa.width  - mw) / 2;
+		y = (wa.height - mh) / 2;
 	}
-	promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
 	inputw = MIN(inputw, mw/3);
 	match();