diff --git a/doc/ChangeLog b/doc/ChangeLog
index 88617188ef..57acacafd6 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,5 +1,6 @@
 2010-06-11	Ralf Corsépius <ralf.corsepius@rtems.org>
 
+	* main.am: Don't install html_projectdir unconditionally.
 	* cpu_supplement/Makefile.am: Include main.am.
 
 2010-06-11	Ralf Corsépius <ralf.corsepius@rtems.org>
diff --git a/doc/main.am b/doc/main.am
index b5dde0910c..bbd0bd3103 100644
--- a/doc/main.am
+++ b/doc/main.am
@@ -1,5 +1,6 @@
-
+if USE_HTML
 html_projectdir = $(htmldir)/$(PROJECT)
+endif
 
 TEXI2WWW_ARGS=\
 -I $(srcdir) -I $(top_srcdir) -I $(top_builddir) \