diff --git a/scripts/minimizeall/contents/code/main.js b/scripts/minimizeall/contents/code/main.js
index a293ec17b..6a45b4ab5 100644
--- a/scripts/minimizeall/contents/code/main.js
+++ b/scripts/minimizeall/contents/code/main.js
@@ -1,73 +1,73 @@
 /********************************************************************
  KWin - the KDE window manager
  This file is part of the KDE project.
 
  Copyright (C) 2014 Thomas Lübking <thomas.luebking@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
 var registeredBorders = [];
 
 function isRelevant(client) {
     return client.minimizable &&
            (client.onAllDesktops || client.desktop === workspace.currentDesktop);
            (!client.activities.length || client.activities.indexOf(workspace.currentActivity.toString()) > -1);
 }
 
 var minimizeAllWindows = function() {
     var allClients = workspace.clientList();
     var clients = [];
     var minimize = false;
     for (var i = 0; i < allClients.length; ++i) {
         if (isRelevant(allClients[i])) {
             clients.push(allClients[i]);
             if (!allClients[i].minimized && allClients[i].minimizedForMinimizeAll !== true) {
                 minimize = true;
             }
         }
     }
     for (var i = 0; i < clients.length; ++i) {
         if ((minimize == clients[i].minimized) || // no change required at all
             (!minimize && clients[i].minimizedForMinimizeAll !== true)) { // unminimize, but not this one
             delete clients[i].minimizedForMinimizeAll;
             continue;
         }
         clients[i].minimized = minimize;
         clients[i].minimizedForMinimizeAll = minimize;
     }
     clients = [];
 }
 
 function init() {
     for (var i in registeredBorders) {
         unregisterScreenEdge(registeredBorders[i]);
     }
 
     registeredBorders = [];
 
     var borders = readConfig("BorderActivate", "").toString().split(",");
     for (var i in borders) {
-        var border = borders[i];
-        if (border != "") {
+        var border = parseInt(borders[i]);
+        if (isFinite(border)) {
             registeredBorders.push(border);
             registerScreenEdge(border, minimizeAllWindows);
         }
     }
 }
 
 options.configChanged.connect(init);
 
 registerShortcut("MinimizeAll", "MinimizeAll", "Meta+Shift+D", minimizeAllWindows);
 init();