diff --git a/packages/tailwindcss-language-server/src/server.ts b/packages/tailwindcss-language-server/src/server.ts
index 897acb5..67bd665 100644
--- a/packages/tailwindcss-language-server/src/server.ts
+++ b/packages/tailwindcss-language-server/src/server.ts
@@ -1643,7 +1643,7 @@ class TW {
             configPath: path.resolve(userDefinedConfigBase, relativeConfigPath),
             documentSelector: [].concat(relativeDocumentSelectorOrSelectors).map((selector) => ({
               priority: DocumentSelectorPriority.USER_CONFIGURED,
-              pattern: path.resolve(userDefinedConfigBase, selector),
+              pattern: normalizePath(path.resolve(userDefinedConfigBase, selector)),
             })),
             isUserConfigured: true,
           }