diff --git a/library/Doxyfile.in b/library/Doxyfile.in
index 97365ef8..5a90b771 100644
--- a/library/Doxyfile.in
+++ b/library/Doxyfile.in
@@ -1814,7 +1814,7 @@ INTERACTIVE_SVG        = NO
 # The tag DOT_PATH can be used to specify the path where the dot tool can be
 # found. If left blank, it is assumed the dot tool can be found in the path.
 
-DOT_PATH               =
+DOT_PATH               = ${DOXYGEN_DOT_PATH}
 
 # The DOTFILE_DIRS tag can be used to specify one or more directories that
 # contain dot files that are included in the documentation (see the