diff --git a/Parser.js b/Parser.js
index 54357c875..340e253b0 100644
--- a/Parser.js
+++ b/Parser.js
@@ -271,6 +271,7 @@ var copyFuncs = {
         "\\approx",
         "\\geq",
         "\\gets",
+        "\\in",
         "\\leftarrow",
         "\\leq",
         "\\neq",
diff --git a/buildTree.js b/buildTree.js
index 92d631e3c..b602c10fc 100644
--- a/buildTree.js
+++ b/buildTree.js
@@ -426,6 +426,7 @@ var charLookup = {
     "\\div": "\u00f7",
     "\\geq": "\u2265",
     "\\gets": "\u2190",
+    "\\in": "\u2208",
     "\\infty": "\u221e",
     "\\leftarrow": "\u2190",
     "\\leq": "\u2264",