diff --git a/wand/magick-image.h b/wand/magick-image.h
index 93a13fa..e7314c6 100644
--- a/wand/magick-image.h
+++ b/wand/magick-image.h
@@ -23,6 +23,9 @@
 extern "C" {
 #endif
 
+extern WandExport ChannelFeatures
+  *MagickGetImageChannelFeatures(MagickWand *,const unsigned long);
+
 extern WandExport ChannelStatistics
   *MagickGetImageChannelStatistics(MagickWand *);