diff --git a/unpacked/config/default.js b/unpacked/config/default.js
index 1a7e8193a..e12f66e44 100644
--- a/unpacked/config/default.js
+++ b/unpacked/config/default.js
@@ -584,6 +584,14 @@ MathJax.Hub.Config({
   //  These parameters control the AsciiMath input jax.
   //
   AsciiMath: {
+    //
+    //  Determines whether the unicode positions for phi and varphi are
+    //  to be swapped or not.  (Unicode originally had these reversed, and
+    //  many fonts have them reversed as well.)  When set to true, phi
+    //  and varphi will correspond to the LaTeX macros of the same name.
+    //
+    fixphi: true,
+    
     //
     //  Determines whether limits are placed above and below operators,
     //  or next to them.  (AsciiMath doesn't have separate in-line and
diff --git a/unpacked/jax/input/AsciiMath/config.js b/unpacked/jax/input/AsciiMath/config.js
index 94f6f79f7..f02dff2aa 100644
--- a/unpacked/jax/input/AsciiMath/config.js
+++ b/unpacked/jax/input/AsciiMath/config.js
@@ -35,6 +35,7 @@ MathJax.InputJax.AsciiMath = MathJax.InputJax({
   extensionDir: MathJax.InputJax.extensionDir + "/AsciiMath",
   
   config: {
+    fixphi: true,                     // switch phi and varphi unicode values
     displaystyle: true,               // put limits above and below operators
     decimalsign: "."                  // can change to "," but watch out for "(1,2)"
   }
diff --git a/unpacked/jax/input/AsciiMath/jax.js b/unpacked/jax/input/AsciiMath/jax.js
index 1d19bda5b..f932511e8 100644
--- a/unpacked/jax/input/AsciiMath/jax.js
+++ b/unpacked/jax/input/AsciiMath/jax.js
@@ -1199,6 +1199,11 @@ ASCIIMATH.Augment({
       // Old versions use the "decimal" option, so take it into account if it
       // is defined by the user. See issue 384.
       decimalsign  = (ASCIIMATH.config.decimal || ASCIIMATH.config.decimalsign);
+      // fix pi and var phi, if requested
+      for (var i = 0, m = AMsymbols.length; i < m; i++) {
+        if (AMsymbols[i].input === "phi")    {AMsymbols[i].output = "\u03D5"}
+        if (AMsymbols[i].input === "varphi") {AMsymbols[i].output = "\u03C6"; i = m}
+      }
       INITASCIIMATH();
       AMinitSymbols();
     },