diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index acbca218fa278053c782e3c9055c61f5f2c86451..524cef4221a12bb2561e6a60f5d9cb009ecf2c95 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -2362,7 +2362,7 @@ MAX_DOT_GRAPH_DEPTH    = 0
 # The default value is: NO.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_TRANSPARENT        = NO
+DOT_TRANSPARENT        = YES
 
 # Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
 # files in one run (i.e. multiple -o and -T options on the command line). This