diff --git a/src/composeProps.ts b/src/composeProps.ts
index f225dd1e..82707808 100644
--- a/src/composeProps.ts
+++ b/src/composeProps.ts
@@ -13,7 +13,7 @@ function composeProps<T extends Record<string, any>>(
     if (typeof func === 'function') {
       composedProps[key] = (...args) => {
         func(...args);
-        return originProps[key](...args);
+        return originProps[key]?.(...args);
       };
     }
   });
diff --git a/tests/composeProps.test.js b/tests/composeProps.test.js
index c6b0d389..8fb76dee 100644
--- a/tests/composeProps.test.js
+++ b/tests/composeProps.test.js
@@ -5,19 +5,23 @@ describe('composeProps', () => {
     const aChange = jest.fn();
     const aBlur = jest.fn();
     const bChange = jest.fn();
+    const bDemo = jest.fn();
     const sourceProps = { value: '11', onChange: aChange, onBlur: aBlur };
-    const patchProps = { onChange: bChange, placeholder: 'x' };
+    const patchProps = { onChange: bChange, onDemo: bDemo, placeholder: 'x' };
 
     const props = composeProps(sourceProps, patchProps, true);
     props.onChange();
     props.onBlur();
+    props.onDemo();
     expect(aChange).toHaveBeenCalled();
     expect(aBlur).toHaveBeenCalled();
     expect(bChange).toHaveBeenCalled();
+    expect(bDemo).toHaveBeenCalled();
     expect(Object.keys(props)).toEqual([
       'value',
       'onChange',
       'onBlur',
+      'onDemo',
       'placeholder',
     ]);
   });
@@ -25,15 +29,23 @@ describe('composeProps', () => {
     const aChange = jest.fn();
     const aBlur = jest.fn();
     const bChange = jest.fn();
+    const bDemo = jest.fn();
     const sourceProps = { value: '11', onChange: aChange, onBlur: aBlur };
-    const patchProps = { onChange: bChange, placeholder: 'x' };
+    const patchProps = { onChange: bChange, onDemo: bDemo, placeholder: 'x' };
 
     const props = composeProps(sourceProps, patchProps);
     props.onChange();
     props.onBlur();
+    props.onDemo();
     expect(aChange).toHaveBeenCalled();
     expect(aBlur).toHaveBeenCalled();
     expect(bChange).toHaveBeenCalled();
-    expect(Object.keys(props)).toEqual(['value', 'onChange', 'onBlur']);
+    expect(bDemo).toHaveBeenCalled();
+    expect(Object.keys(props)).toEqual([
+      'value',
+      'onChange',
+      'onBlur',
+      'onDemo',
+    ]);
   });
 });