diff --git a/Makefile.am b/Makefile.am
index 423cf32..231b8de 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -285,6 +285,7 @@
 html:
 	doxygen config/MagickCore.dox
 	doxygen config/MagickWand.dox
+	doxygen config/Magick++.dox
 
 #
 # Build Windows source Zip and 7Zip balls