diff --git a/src/Tooltip.tsx b/src/Tooltip.tsx
index 52a5aae..ac1ea87 100644
--- a/src/Tooltip.tsx
+++ b/src/Tooltip.tsx
@@ -120,8 +120,12 @@ const Tooltip = React.forwardRef<TooltipRef, TooltipProps>((props, ref) => {
   // ======================== Children ========================
   const getChildren: TriggerProps['children'] = ({ open }) => {
     const child = React.Children.only(children);
+    const childAriaDescribedBy = (child.props as React.AriaAttributes)['aria-describedby'];
+    const ariaDescribedBy = [childAriaDescribedBy, overlay && open ? mergedId : undefined]
+      .filter(Boolean)
+      .join(' ');
     const ariaProps: React.AriaAttributes = {
-      'aria-describedby': overlay && open ? mergedId : undefined,
+      'aria-describedby': ariaDescribedBy || undefined,
     };
     return React.cloneElement(child, ariaProps);
   };
diff --git a/tests/index.test.tsx b/tests/index.test.tsx
index 50b4dbb..019854d 100644
--- a/tests/index.test.tsx
+++ b/tests/index.test.tsx
@@ -575,6 +575,28 @@ describe('rc-tooltip', () => {
       expect(container.querySelector('button')).not.toHaveAttribute('aria-describedby');
     });
 
+    it('should preserve the child aria-describedby across visibility changes', () => {
+      const overlay = 'tooltip content';
+      const renderTooltip = (visible: boolean) => (
+        <Tooltip id="tooltip-description" overlay={overlay} visible={visible}>
+          <button aria-describedby="existing-description">Click me</button>
+        </Tooltip>
+      );
+      const { container, rerender } = render(renderTooltip(false));
+      const trigger = container.querySelector('button');
+
+      expect(trigger).toHaveAttribute('aria-describedby', 'existing-description');
+
+      rerender(renderTooltip(true));
+      expect(trigger).toHaveAttribute(
+        'aria-describedby',
+        'existing-description tooltip-description',
+      );
+
+      rerender(renderTooltip(false));
+      expect(trigger).toHaveAttribute('aria-describedby', 'existing-description');
+    });
+
     it('should preserve original props of children', () => {
       const onMouseEnter = jest.fn();