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diff --git a/doc/install.doc b/doc/install.doc
index f565ab1..49b3d9c 100644
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+++ b/doc/install.doc
@@ -66,6 +66,9 @@ tools should be installed.
\latexonly(see {\tt http://www.research.att.com/sw/tools/graphviz/})\endlatexonly.
Needed for the include dependency graphs,
the graphical inheritance graphs, and the collaboration graphs.
+ \note If you compile graphviz yourself, make sure you do include
+ freetype support (which requires the freetype library and header files),
+ otherwise dot will produce a warning that it cannot find doxfont!
<li>The ghostscript interpreter.
</ul>