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diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts
index 7f8bb84bc705a4b7834d82abede0ae001c9eee8f..9a53db3b3fcd11cd042e69aeafcdbee8ec51aab6 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts
@@ -90,10 +90,11 @@       typeof value === 'string' ||
       typeof value === 'number' ||
       value instanceof String ||
       value instanceof Number ||
-      Array.isArray(value)
+      Array.isArray(value) ||
+      typeof value === 'function'
     )
   ) {
-    let reason = `'${pathToString(path)}' was found but does not resolve to a string.`
+    let reason = `'${pathToString(path)}' was found but does not resolve to a string, number, array or function.`
 
     if (isObject(value)) {
       let validKeys = Object.keys(value).filter(