diff --git a/docs/expressions/expression_trees.md b/docs/expressions/expression_trees.md
index f2ce69230c..e09c6e9a77 100644
--- a/docs/expressions/expression_trees.md
+++ b/docs/expressions/expression_trees.md
@@ -477,6 +477,7 @@ Properties:
 
 - `fn: Node | string` (read-only) The object or function name which to invoke.
 - `args: Node[]`
+- `name: string` The name of the function
 
 Examples:
 
diff --git a/test/generated-code-tests/entry/mainAny.test.js b/test/generated-code-tests/entry/mainAny.test.js
index 4c7bcc9216..3f832a92bb 100644
--- a/test/generated-code-tests/entry/mainAny.test.js
+++ b/test/generated-code-tests/entry/mainAny.test.js
@@ -2,7 +2,7 @@ import assert from 'assert'
 import * as mainAny from '../../../src/entry/mainAny.js'
 import * as factoriesAny from '../../../src/factoriesAny.js'
 import { createSnapshotFromFactories, validateBundle, validateTypeOf } from '../../../src/utils/snapshot.js'
-const { create, all, add, matrix, isObject, isMatrix, pi, speedOfLight, sqrt, evaluate, chain, reviver, Complex, addDependencies } = mainAny
+const { create, all, add, matrix, isObject, isMatrix, pi, speedOfLight, sqrt, evaluate, chain, reviver, Complex, FunctionNode, SymbolNode, ConstantNode, addDependencies } = mainAny
 
 const {
   expectedInstanceStructure,
@@ -146,6 +146,14 @@ describe('mainAny', function () {
     assert.deepStrictEqual(obj, c)
   })
 
+  it('should have the full FunctionNode interface', () => {
+    const funcname = 'myfunc'
+    const myfunc =
+      new FunctionNode(
+        new SymbolNode(funcname), [new ConstantNode(2), new ConstantNode(3)])
+    assert.strictEqual(myfunc.name, funcname)
+  })
+
   // TODO: test export of errors
   // TODO: test export of classes
 })
diff --git a/types/index.d.ts b/types/index.d.ts
index 1be904cffe..a19e45aed1 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -233,6 +233,7 @@ declare namespace math {
   interface FunctionNode extends MathNodeCommon {
     type: 'FunctionNode';
     isFunctionNode: true;
+    name: string;
     fn: SymbolNode;
     args: MathNode[];
   }