diff --git a/magick/cache-private.h b/magick/cache-private.h
index d5bd26b..bd75d7d 100644
--- a/magick/cache-private.h
+++ b/magick/cache-private.h
@@ -118,6 +118,9 @@
ColorspaceType
colorspace;
+ ssize_t
+ channels;
+
CacheType
type;
@@ -235,6 +238,9 @@
*QueueAuthenticNexus(Image *,const ssize_t,const ssize_t,const size_t,
const size_t,NexusInfo *,ExceptionInfo *);
+extern MagickExport size_t
+ GetPixelCacheChannels(const Cache);
+
extern MagickExport void
ClonePixelCacheMethods(Cache,const Cache),
GetPixelCacheTileSize(const Image *,size_t *,size_t *),