diff --git a/js/kiri.js b/js/kiri.js
index 854fac0e..3ff15376 100644
--- a/js/kiri.js
+++ b/js/kiri.js
@@ -1435,7 +1435,7 @@ self.kiri.license = exports.LICENSE;
     function layoutPlatform(event, space) {
         var layout = (viewMode === VIEWS.ARRANGE),
             modified = false,
-            gap = space || (1 + settings.process.sliceSupportExtra),
+            gap = space || (1 + (settings.process.sliceSupportExtra || 0)),
             topZ = MODE === MODES.CAM ? camTopZ : 0;
 
         setViewMode(VIEWS.ARRANGE);
diff --git a/js/license.js b/js/license.js
index f29e33d7..f81a188f 100644
--- a/js/license.js
+++ b/js/license.js
@@ -1,7 +1,7 @@
 var exports = {
     COPYRIGHT:"Copyright (C) 2014-2017 Stewart Allen <stewart@neuron.com> - All Rights Reserved",
     LICENSE:"Unauthorized copying, modification and re-distribution are strictly prohibited without prior written consent.",
-    VERSION:"1.0.88"
+    VERSION:"1.0.89"
 };
 if (!module) var module = {};
 module.exports = exports;