diff --git a/docs/adg/Makefile.am b/docs/adg/Makefile.am
index 1679c9cc..09abfc1b 100644
--- a/docs/adg/Makefile.am
+++ b/docs/adg/Makefile.am
@@ -1,97 +1,97 @@
 include $(top_srcdir)/build/Makefile.am.common
 
 DOC_MODULE=		adg
 DOC_MAIN_SGML_FILE=	$(DOC_MODULE)-docs.xml
 DOC_SOURCE_DIR=		$(top_srcdir)/src/adg
 SCANGOBJ_OPTIONS=
 SCAN_OPTIONS=		--rebuild-types \
 			--rebuild-sections
 MKDB_OPTIONS=		--name-space=adg \
 			--sgml-mode \
 			--output-format=xml \
 			--default-includes="$(DOC_MODULE)-1/$(DOC_MODULE).h"
 MKHTML_OPTIONS=
 FIXXREF_OPTIONS=	--extra-dir=$(top_srcdir)/docs/cpml/html \
-			$(EXTRA_DIR)
+			$(EXTRADIR)
 HFILE_GLOB=		$(DOC_SOURCE_DIR)/*.h
 EXTRA_HFILES=		$(top_builddir)/src/adg/adg-canvas.h
 CFILE_GLOB=		$(DOC_SOURCE_DIR)/*.c
 IGNORE_HFILES=		adg.h \
 			adg-adim-private.h \
 			adg-alignment-private.h \
 			adg-arrow-private.h \
 			adg-cairo-fallback.h \
 			adg-canvas-private.h \
 			adg-color-style-private.h \
 			adg-container-private.h \
 			adg-dash-private.h \
 			adg-dim-private.h \
 			adg-dim-style-private.h \
 			adg-dress-private.h \
 			adg-edges-private.h \
 			adg-entity-private.h \
 			adg-fill-style-private.h \
 			adg-font-style-private.h \
 			adg-forward-declarations.h \
 			adg-gtk-area-private.h \
 			adg-gtk-layout-private.h \
 			adg-hatch-private.h \
 			adg-internal.h \
 			adg-introspection.h \
 			adg-ldim-private.h \
 			adg-line-style-private.h \
 			adg-logo-private.h \
 			adg-marker-private.h \
 			adg-marshal.h \
 			adg-matrix-fallback.h \
 			adg-model-private.h \
 			adg-pango-style-private.h \
 			adg-path-private.h \
 			adg-projection-private.h \
 			adg-rdim-private.h \
 			adg-ruled-fill-private.h \
 			adg-stroke-private.h \
 			adg-table-private.h \
 			adg-table-style-private.h \
 			adg-text-internal.h \
 			adg-text-private.h \
 			adg-title-block-private.h \
 			adg-toy-text-private.h \
 			adg-trail-private.h \
 			adg-type-builtins.h \
 			test-internal.h
 HTML_IMAGES=
 content_files=		CONTRIBUTING.xml \
 			HACKING.xml \
 			NEWS.xml \
 			README.xml \
 			TODO.xml
 expand_content_files=
 
 GTKDOC_CFLAGS=		-I$(top_srcdir)/src \
 			$(CAIRO_CFLAGS) \
 			$(CAIRO_GOBJECT_CFLAGS) \
 			$(GOBJECT2_CFLAGS)
 GTKDOC_LIBS=		$(top_builddir)/src/adg/libadg-1.la \
 			$(top_builddir)/src/cpml/libcpml-1.la
 
 if HAVE_GTK2
 GTKDOC_CFLAGS+=		$(GTK2_CFLAGS)
 GTKDOC_LIBS+=		$(GTK2_LIBS)
 endif
 
 if HAVE_PANGO
 GTKDOC_CFLAGS+=		$(PANGO_CFLAGS)
 GTKDOC_LIBS+=		$(PANGO_LIBS)
 endif
 
 GTKDOC_LIBS+=		$(CAIRO_LIBS) \
 			$(CAIRO_GOBJECT_LIBS) \
 			$(GOBJECT2_LIBS)
 
 include $(top_srcdir)/build/Makefile.am.gtk-doc
 
 DISTCLEANFILES=		$(DOC_MODULE)-sections.txt \
 			$(DOC_MODULE).types
 
 EXTRA_DIST+=		$(content_files)