diff --git a/src/core/wrapper/layout/layout.tape.js b/src/core/wrapper/layout/layout.tape.js
index 185af813d..9303f5865 100644
--- a/src/core/wrapper/layout/layout.tape.js
+++ b/src/core/wrapper/layout/layout.tape.js
@@ -217,7 +217,7 @@ BI.VTapeLayout = BI.inherit(BI.Layout, {
                 top: self._optimiseGap(top[i] + self._optimiseItemTgap(item) + self._optimiseItemVgap(item) + o.vgap + o.tgap)
             });
 
-            if (rowSize === "" || rowSize === "fill") {
+            if (BI.isNull(rowSize) || rowSize === "" || rowSize === "fill") {
                 return true;
             }
         });
@@ -235,7 +235,7 @@ BI.VTapeLayout = BI.inherit(BI.Layout, {
                 bottom: self._optimiseGap(bottom[i] + self._optimiseItemBgap(item) + self._optimiseItemVgap(item) + o.vgap + o.bgap)
             });
 
-            if (rowSize === "" || rowSize === "fill") {
+            if (BI.isNull(rowSize) || rowSize === "" || rowSize === "fill") {
                 return true;
             }
         });