diff --git a/lib/schema.js b/lib/schema.js
index 852851b2265..a13ce57ebf3 100644
--- a/lib/schema.js
+++ b/lib/schema.js
@@ -2027,6 +2027,12 @@ Schema.prototype.index = function(fields, options) {
   if (options.expires) {
     utils.expires(options);
   }
+  for (const key in fields) {
+    if (this.aliases[key]) {
+      fields[this.aliases[key]] = fields[key];
+      delete fields[key];
+    }
+  }
 
   this._indexes.push([fields, options]);
   return this;
diff --git a/test/schema.alias.test.js b/test/schema.alias.test.js
index 0f37f595c1a..2c0977a4206 100644
--- a/test/schema.alias.test.js
+++ b/test/schema.alias.test.js
@@ -183,4 +183,16 @@ describe('schema alias option', function() {
     assert.ok(schema.virtuals['name1']);
     assert.ok(schema.virtuals['name2']);
   });
+  it('supports passing the alias name for an index (gh-13276)', function() {
+    const testSchema = new Schema({
+      fullName: {
+        type: String,
+        alias: 'short'
+      }
+    });
+    testSchema.index({ short: 1 });
+    const indexes = testSchema.indexes();
+    assert.equal(indexes[0][0].fullName, 1);
+
+  });
 });