diff --git a/packages/core/src/utils/variantGroup.ts b/packages/core/src/utils/variantGroup.ts
index 056d9b3447..9a37823781 100644
--- a/packages/core/src/utils/variantGroup.ts
+++ b/packages/core/src/utils/variantGroup.ts
@@ -1,6 +1,6 @@
 import type MagicString from 'magic-string'
 
-export const regexClassGroup = /((?:[!@\w+:_/-]|\[&?>?:?.*\])+?)([:-])\(((?:[~!\w\s:/\\,%#.$-]|\[.*?\])+?)\)(?!\s*?=>)/gm
+export const regexClassGroup = /((?:[!@\w+:_/-]|\[&?>?:?.*\])+?)([:-])\(((?:[~!\w\s:/\\,%#.$?-]|\[.*?\])+?)\)(?!\s*?=>)/gm
 
 export function expandVariantGroup(str: string, separators?: string[], depth?: number): string
 export function expandVariantGroup(str: MagicString, separators?: string[], depth?: number): MagicString
diff --git a/test/variant-group.test.ts b/test/variant-group.test.ts
index ab93a47297..20c6e86bab 100644
--- a/test/variant-group.test.ts
+++ b/test/variant-group.test.ts
@@ -52,4 +52,8 @@ describe('variant-group', () => {
     expect(expandVariantGroup('@a:(c-d d-c)')).toEqual('@a:c-d @a:d-c')
     expect(expandVariantGroup('!@a:(c-d d-c)')).toEqual('!@a:c-d !@a:d-c')
   })
+
+  test('inlucde ?', async () => {
+    expect(expandVariantGroup('a:(b?c d)')).toEqual('a:b?c a:d')
+  })
 })