diff --git a/unpacked/jax/output/SVG/autoload/mtable.js b/unpacked/jax/output/SVG/autoload/mtable.js
index 4fe4f0b5b..02a4610fa 100644
--- a/unpacked/jax/output/SVG/autoload/mtable.js
+++ b/unpacked/jax/output/SVG/autoload/mtable.js
@@ -164,7 +164,7 @@ MathJax.Hub.Register.StartupHook("SVG Jax Ready",function () {
       var Y, fY, n = "";
       if (typeof(values.align) !== "string") {values.align = String(values.align)}
       if (values.align.match(/(top|bottom|center|baseline|axis)( +(-?\d+))?/))
-        {n = RegExp.$3; values.align = RegExp.$1} else {values.align = this.defaults.align}
+        {n = RegExp.$3||""; values.align = RegExp.$1} else {values.align = this.defaults.align}
       if (n !== "") {
         //
         //  Find the height of the given row