diff --git a/packages/tailwindcss-language-service/src/completionProvider.ts b/packages/tailwindcss-language-service/src/completionProvider.ts
index 0c381a4996e0064f4f97ef545dbcc393ef766cd6..cef47b7b8425fe69aecbe98c93608725a8bf850c 100644
--- a/packages/tailwindcss-language-service/src/completionProvider.ts
+++ b/packages/tailwindcss-language-service/src/completionProvider.ts
@@ -199,7 +199,7 @@       end: position,
     },
     (item) => {
       if (item.kind === 9) {
-        return flagEnabled(state, 'applyComplexClasses')
+        return semver.gte(state.version, '2.0.0-alpha.1') || flagEnabled(state, 'applyComplexClasses')
       }
       let validated = validateApply(state, item.data)
       return validated !== null && validated.isApplyable === true

diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidApplyDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidApplyDiagnostics.ts
index 11d835dcd9479cd0b07c9aaf36e32c909f7d9463..3e6d03e23a476d4c9ae398adffb0738d7f68060a 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidApplyDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidApplyDiagnostics.ts
@@ -3,7 +3,6 @@ import { InvalidApplyDiagnostic, DiagnosticKind } from './types'
 import { Settings, State } from '../util/state'
 import type { TextDocument, DiagnosticSeverity } from 'vscode-languageserver'
 import { validateApply } from '../util/validateApply'
-import { flagEnabled } from '../util/flagEnabled'
 
 export function getInvalidApplyDiagnostics(
   state: State,
@@ -12,7 +11,6 @@   settings: Settings
 ): InvalidApplyDiagnostic[] {
   let severity = settings.lint.invalidApply
   if (severity === 'ignore') return []
-  if (flagEnabled(state, 'applyComplexClasses')) return []
 
   const classNames = findClassNamesInRange(document, undefined, 'css')
 

diff --git a/packages/tailwindcss-language-service/src/util/validateApply.ts b/packages/tailwindcss-language-service/src/util/validateApply.ts
index 5a17956593549d6cf08c281ad4a43afd1faf3fdc..e661c4cd22d880785499e4b86c1948a43788a3bc 100644
--- a/packages/tailwindcss-language-service/src/util/validateApply.ts
+++ b/packages/tailwindcss-language-service/src/util/validateApply.ts
@@ -1,6 +1,7 @@
 import { State } from './state'
 import { getClassNameMeta } from './getClassNameMeta'
 import { flagEnabled } from './flagEnabled'
+import semver from 'semver'
 
 export function validateApply(
   state: State,
@@ -9,8 +10,11 @@ ): { isApplyable: true } | { isApplyable: false; reason: string } | null {
   const meta = getClassNameMeta(state, classNameOrParts)
   if (!meta) return null
 
+  if (
+
 import { State } from './state'
-import { State } from './state'
+    flagEnabled(state, 'applyComplexClasses')
+  ) {
     return { isApplyable: true }
   }