diff --git a/packages/react-reconciler/src/ReactFiberHooks.js b/packages/react-reconciler/src/ReactFiberHooks.js
index 0450495ff0d4..8ea915b50072 100644
--- a/packages/react-reconciler/src/ReactFiberHooks.js
+++ b/packages/react-reconciler/src/ReactFiberHooks.js
@@ -483,8 +483,8 @@ function areHookInputsEqual(
           'Previous: %s\n' +
           'Incoming: %s',
         currentHookNameInDev,
-        `[${prevDeps.join(', ')}]`,
-        `[${nextDeps.join(', ')}]`,
+        `[${prevDeps.map(String).join(', ')}]`,
+        `[${nextDeps.map(String).join(', ')}]`,
       );
     }
   }
diff --git a/packages/react-reconciler/src/__tests__/ReactHooks-test.internal.js b/packages/react-reconciler/src/__tests__/ReactHooks-test.internal.js
index e61e4a825602..e4e546f2674f 100644
--- a/packages/react-reconciler/src/__tests__/ReactHooks-test.internal.js
+++ b/packages/react-reconciler/src/__tests__/ReactHooks-test.internal.js
@@ -591,6 +591,33 @@ describe('ReactHooks', () => {
     ]);
   });
 
+  it('warns about variable number of dependencies when deps contain Symbols', async () => {
+    const {useLayoutEffect} = React;
+    const sym = Symbol('testSymbol');
+    function App(props) {
+      useLayoutEffect(() => {}, props.dependencies);
+      return null;
+    }
+    let root;
+    await act(() => {
+      root = ReactTestRenderer.create(<App dependencies={[sym]} />, {
+        unstable_isConcurrent: true,
+      });
+    });
+    await act(() => {
+      root.update(<App dependencies={[sym, 'extra']} />);
+    });
+    assertConsoleErrorDev([
+      'The final argument passed to useLayoutEffect changed size ' +
+        'between renders. The order and size of this array must remain ' +
+        'constant.\n' +
+        '\n' +
+        'Previous: [Symbol(testSymbol)]\n' +
+        'Incoming: [Symbol(testSymbol), extra]\n' +
+        '    in App (at **)',
+    ]);
+  });
+
   it('warns if switching from dependencies to no dependencies', async () => {
     const {useMemo} = React;
     function App({text, hasDeps}) {
diff --git a/packages/react-server/src/ReactFizzHooks.js b/packages/react-server/src/ReactFizzHooks.js
index 24e676fc7108..d1d853f0c85f 100644
--- a/packages/react-server/src/ReactFizzHooks.js
+++ b/packages/react-server/src/ReactFizzHooks.js
@@ -151,8 +151,8 @@ function areHookInputsEqual(
           'Previous: %s\n' +
           'Incoming: %s',
         currentHookNameInDev,
-        `[${nextDeps.join(', ')}]`,
-        `[${prevDeps.join(', ')}]`,
+        `[${nextDeps.map(String).join(', ')}]`,
+        `[${prevDeps.map(String).join(', ')}]`,
       );
     }
   }