diff --git a/unpacked/extensions/TeX/AMSmath.js b/unpacked/extensions/TeX/AMSmath.js
index f26a23c40..9350a5090 100644
--- a/unpacked/extensions/TeX/AMSmath.js
+++ b/unpacked/extensions/TeX/AMSmath.js
@@ -121,7 +121,10 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
       smallmatrix:   ['Array',null,null,null,'c',COLS([1/3]),".2em",'S',1],
       
       'equation':    ['EquationBegin','Equation',true],
-      'equation*':   ['EquationBegin','EquationStar',false]
+      'equation*':   ['EquationBegin','EquationStar',false],
+
+      eqnarray:      ['AMSarray',null,true,true, 'rcl',COLS([MML.LENGTH.THICKMATHSPACE]),".5em"],
+      'eqnarray*':   ['AMSarray',null,false,true,'rcl',COLS([MML.LENGTH.THICKMATHSPACE]),".5em"]
     },
     
     delimiter: {
@@ -463,7 +466,7 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
     EndRow: function () {
       var mtr = MML.mtr;
       if (!this.global.tag && this.numbered) {this.autoTag()}
-      if (this.global.tag &&! this.global.notags) {
+      if (this.global.tag && !this.global.notags) {
         this.row = [this.getTag()].concat(this.row);
         mtr = MML.mlabeledtr;
       }
diff --git a/unpacked/jax/input/TeX/jax.js b/unpacked/jax/input/TeX/jax.js
index c671a6988..53e95a56b 100644
--- a/unpacked/jax/input/TeX/jax.js
+++ b/unpacked/jax/input/TeX/jax.js
@@ -984,12 +984,13 @@
         vmatrix:      ['Array',null,'\\vert','\\vert','c'],
         Vmatrix:      ['Array',null,'\\Vert','\\Vert','c'],
         cases:        ['Array',null,'\\{','.','ll',null,".1em"],
-        eqnarray:     ['Array',null,null,null,'rcl',MML.LENGTH.THICKMATHSPACE,".5em",'D'],
-        'eqnarray*':  ['Array',null,null,null,'rcl',MML.LENGTH.THICKMATHSPACE,".5em",'D'],
 
         equation:     [null,'Equation'],
         'equation*':  [null,'Equation'],
 
+        eqnarray:     ['ExtensionEnv',null,'AMSmath'],
+        'eqnarray*':  ['ExtensionEnv',null,'AMSmath'],
+
         align:        ['ExtensionEnv',null,'AMSmath'],
         'align*':     ['ExtensionEnv',null,'AMSmath'],
         aligned:      ['ExtensionEnv',null,'AMSmath'],