diff --git a/Sources/SwLibTidy/SwLibTidyBufferProtocol.swift b/Sources/SwLibTidy/SwLibTidyBufferProtocol.swift
index abf7518..620bda7 100644
--- a/Sources/SwLibTidy/SwLibTidyBufferProtocol.swift
+++ b/Sources/SwLibTidy/SwLibTidyBufferProtocol.swift
@@ -14,6 +14,7 @@
  */
 
 import Foundation
+import CoreFoundation
 import CLibTidy