diff --git a/src/symbols.js b/src/symbols.js
index 3ac0c135..05bdc02b 100644
--- a/src/symbols.js
+++ b/src/symbols.js
@@ -82,7 +82,7 @@ defineSymbol(math, main, rel, "\u22a5", "\\perp");
 defineSymbol(math, main, rel, "\u2aaf", "\\preceq", true);
 defineSymbol(math, main, rel, "\u2ab0", "\\succeq", true);
 defineSymbol(math, main, rel, "\u2243", "\\simeq", true);
-defineSymbol(math, main, rel, "\u2223", "\\mid");
+defineSymbol(math, main, rel, "\u2223", "\\mid", true);
 defineSymbol(math, main, rel, "\u226a", "\\ll");
 defineSymbol(math, main, rel, "\u226b", "\\gg", true);
 defineSymbol(math, main, rel, "\u224d", "\\asymp", true);
diff --git a/test/katex-spec.js b/test/katex-spec.js
index b49abe68..64ff2f21 100644
--- a/test/katex-spec.js
+++ b/test/katex-spec.js
@@ -2694,7 +2694,7 @@ describe("Unicode", function() {
     });
 
     it("should parse relations", function() {
-        expect("∈∋∝∼∽≂≃≅≈≊≍≎≏≐≑≒≓≖≗≜≡≤≥≦≧≫≬≳≷≺≻≼≽≾≿∴∵").toParse();
+        expect("∈∋∝∼∽≂≃≅≈≊≍≎≏≐≑≒≓≖≗≜≡≤≥≦≧≫≬≳≷≺≻≼≽≾≿∴∵∣").toParse();
     });
 
     it("should parse big operators", function() {