diff --git a/Source/GSURLPrivate.h b/Source/GSURLPrivate.h
index 97d2515d9..189e611ba 100644
--- a/Source/GSURLPrivate.h
+++ b/Source/GSURLPrivate.h
@@ -68,6 +68,7 @@
 /*
  * Internal class for handling HTTP digest authentication
  */
+@class	GSLazyLock;
 @interface GSHTTPDigest : NSObject
 {
   GSLazyLock		*_lock;