diff --git a/lib/lib-dynamodb/src/commands/marshallInput.spec.ts b/lib/lib-dynamodb/src/commands/marshallInput.spec.ts
index c6df6f96e4e43..5a407cd2c9613 100644
--- a/lib/lib-dynamodb/src/commands/marshallInput.spec.ts
+++ b/lib/lib-dynamodb/src/commands/marshallInput.spec.ts
@@ -10,6 +10,13 @@ describe("marshallInput and processObj", () => {
       }
     );
   });
+
+  it("should ignore function properties", () => {
+    const input = { Items: [() => {}, 1, "test"] };
+    const inputKeyNodes = { Items: null };
+    const output = { Items: { L: [{ N: "1" }, { S: "test" }] } };
+    expect(marshallInput(input, inputKeyNodes, { convertTopLevelContainer: true })).toEqual(output);
+  });
 });
 
 describe("marshallInput for commands", () => {
diff --git a/lib/lib-dynamodb/src/commands/utils.spec.ts b/lib/lib-dynamodb/src/commands/utils.spec.ts
index dad1cfa939f8d..8ec4332df9a0e 100644
--- a/lib/lib-dynamodb/src/commands/utils.spec.ts
+++ b/lib/lib-dynamodb/src/commands/utils.spec.ts
@@ -19,6 +19,12 @@ describe("utils", () => {
       nativeAttrObj: { Item1: nativeAttrValue(1), Item2: nativeAttrValue(2), ...notAttrValue },
       attrObj: { Item1: attrValue(1), Item2: attrValue(2), ...notAttrValue },
     },
+    {
+      testName: "object with function property",
+      keyNodes: { Item: {} },
+      nativeAttrObj: { Item: { id: 1, func: () => {} }, ...notAttrValue },
+      attrObj: { Item: { id: { N: "1" } }, ...notAttrValue },
+    },
     {
       testName: "array",
       keyNodes: { Items: { "*": {} } },
diff --git a/packages/util-dynamodb/src/marshall.spec.ts b/packages/util-dynamodb/src/marshall.spec.ts
index ea16c3cb2d030..cc16845e62459 100644
--- a/packages/util-dynamodb/src/marshall.spec.ts
+++ b/packages/util-dynamodb/src/marshall.spec.ts
@@ -62,4 +62,12 @@ describe("marshall", () => {
     expect(convertToAttr).toHaveBeenCalledTimes(1);
     expect(convertToAttr).toHaveBeenCalledWith(input, undefined);
   });
+
+  it("with function properties in input object", () => {
+    const input = { a: "A", b: "B", func: () => {}, func2: () => {} };
+    // const expectedOutput = { a: { M: mockOutput }, b: { M: mockOutput } };
+    expect(marshall(input)).toEqual(mockOutput);
+    expect(convertToAttr).toHaveBeenCalledTimes(1);
+    expect(convertToAttr).toHaveBeenCalledWith(input, undefined);
+  });
 });