diff --git a/MagickCore/cache-view.h b/MagickCore/cache-view.h
index dd4e6ba..3d787c8 100644
--- a/MagickCore/cache-view.h
+++ b/MagickCore/cache-view.h
@@ -49,7 +49,8 @@
   CacheView;
 
 extern MagickExport CacheView
-  *AcquireCacheView(const Image *),
+  *AcquireAuthenticCacheView(const Image *,ExceptionInfo *),
+  *AcquireVirtualCacheView(const Image *,ExceptionInfo *),
   *CloneCacheView(const CacheView *),
   *DestroyCacheView(CacheView *);