diff --git a/src/functions.js b/src/functions.js
index dce57095..68460768 100644
--- a/src/functions.js
+++ b/src/functions.js
@@ -258,6 +258,13 @@ defineFunction([
     };
 });
 
+const singleCharIntegrals: {[string]: string} = {
+    "\u222b": "\\int",
+    "\u222c": "\\iint",
+    "\u222d": "\\iiint",
+    "\u222e": "\\oint",
+};
+
 // There are 2 flags for operators; whether they produce limits in
 // displaystyle, and whether they are symbols and should grow in
 // displaystyle. These four groups cover the four possible choices.
@@ -297,15 +304,20 @@ defineFunction([
 
 // No limits, symbols
 defineFunction([
-    "\\int", "\\iint", "\\iiint", "\\oint",
+    "\\int", "\\iint", "\\iiint", "\\oint", "\u222b", "\u222c",
+    "\u222d", "\u222e",
 ], {
     numArgs: 0,
 }, function(context) {
+    let fName = context.funcName;
+    if (fName.length === 1) {
+        fName = singleCharIntegrals[fName];
+    }
     return {
         type: "op",
         limits: false,
         symbol: true,
-        body: context.funcName,
+        body: fName,
     };
 });
 
diff --git a/src/functions/op.js b/src/functions/op.js
index 285c279d..f7c93aab 100644
--- a/src/functions/op.js
+++ b/src/functions/op.js
@@ -220,22 +220,43 @@ const mathmlBuilder = (group, options) => {
     return node;
 };
 
+const singleCharBigOps: {[string]: string} = {
+    "\u220F": "\\prod",
+    "\u2210": "\\coprod",
+    "\u2211": "\\sum",
+    "\u22c0": "\\bigwedge",
+    "\u22c1": "\\bigvee",
+    "\u22c2": "\\bigcap",
+    "\u22c3": "\\bigcap",
+    "\u2a00": "\\bigodot",
+    "\u2a01": "\\bigoplus",
+    "\u2a02": "\\bigotimes",
+    "\u2a04": "\\biguplus",
+    "\u2a06": "\\bigsqcup",
+};
+
 defineFunction({
     type: "op",
     names: [
         "\\coprod", "\\bigvee", "\\bigwedge", "\\biguplus", "\\bigcap",
         "\\bigcup", "\\intop", "\\prod", "\\sum", "\\bigotimes",
-        "\\bigoplus", "\\bigodot", "\\bigsqcup", "\\smallint",
+        "\\bigoplus", "\\bigodot", "\\bigsqcup", "\\smallint", "\u220F",
+        "\u2210", "\u2211", "\u22c0", "\u22c1", "\u22c2", "\u22c3", "\u2a00",
+        "\u2a01", "\u2a02", "\u2a04", "\u2a06",
     ],
     props: {
         numArgs: 0,
     },
     handler: (context, args) => {
+        let fName = context.funcName;
+        if (fName.length === 1) {
+            fName = singleCharBigOps[fName];
+        }
         return {
             type: "op",
             limits: true,
             symbol: true,
-            body: context.funcName,
+            body: fName,
         };
     },
     htmlBuilder,
diff --git a/test/katex-spec.js b/test/katex-spec.js
index e4718866..09142097 100644
--- a/test/katex-spec.js
+++ b/test/katex-spec.js
@@ -2634,6 +2634,10 @@ describe("Unicode", function() {
         expect("∈∋∝∼∽≂≃≅≈≊≍≎≏≐≑≒≓≖≗≜≡≤≥≦≧≫≬≳≷≺≻≼≽≾≿").toParse();
     });
 
+    it("should parse big operators", function() {
+        expect("∏∐∑∫∬∭∮⋀⋁⋂⋃⨀⨁⨂⨄⨆").toParse();
+    });
+
     it("should parse more relations", function() {
         expect("⊂⊃⊆⊇⊏⊐⊑⊒⊢⊣⊩⊪⊸⋈⋍⋐⋑⋔⋙⋛⋞⋟⌢⌣⩾⪆⪌⪕⪖⪯⪰⪷⪸⫅⫆").toParse();
     });