diff --git a/packages/tailwindcss-language-service/src/util/find.ts b/packages/tailwindcss-language-service/src/util/find.ts
index 028386507fd40a52de8f31403401970ed5c6d8d8..8dd6ad93cad17673a1eebac6de4e6ccea88a19d2 100644
--- a/packages/tailwindcss-language-service/src/util/find.ts
+++ b/packages/tailwindcss-language-service/src/util/find.ts
@@ -350,7 +350,10 @@   doc: TextDocument,
   range?: Range
 ): DocumentHelperFunction[] {
   const text = getTextWithoutComments(doc, 'css', range)
-  let matches = findAll(/\b(?<helper>config|theme)(?<innerPrefix>\(\s*)(?<path>[^)]*?)\s*\)/g, text)
+  let matches = findAll(
+    /(?<prefix>\s|^)(?<helper>config|theme)(?<innerPrefix>\(\s*)(?<path>[^)]*?)\s*\)/g,
+    text
+  )
 
   return matches.map((match) => {
     let quotesBefore = ''
@@ -364,7 +367,11 @@       path = matches[1]
     }
     path = path.replace(/['"]*\s*$/, '')
 
-    let startIndex = match.index + match.groups.helper.length + match.groups.innerPrefix.length
+    let startIndex =
+      match.index +
+      match.groups.prefix.length +
+      match.groups.helper.length +
+      match.groups.innerPrefix.length
 
     return {
       helper: match.groups.helper === 'theme' ? 'theme' : 'config',