diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/doc/Doxyfiles/all_Doxyfile OpenSceneGraph-OpenSceneGraph-3.6.5-new/doc/Doxyfiles/all_Doxyfile
--- OpenSceneGraph-OpenSceneGraph-3.6.5/doc/Doxyfiles/all_Doxyfile	2020-01-31 12:03:07.000000000 +0100
+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/doc/Doxyfiles/all_Doxyfile	2021-11-13 21:34:02.678773480 +0100
@@ -230,7 +230,7 @@ CLASS_DIAGRAMS         = YES
 MSCGEN_PATH            = 
 HIDE_UNDOC_RELATIONS   = YES
 HAVE_DOT               = YES
-DOT_FONTNAME           = FreeSans
+DOT_FONTNAME           = 
 DOT_FONTPATH           = 
 CLASS_GRAPH            = YES
 COLLABORATION_GRAPH    = NO
diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/doc/Doxyfiles/auto_Doxyfile OpenSceneGraph-OpenSceneGraph-3.6.5-new/doc/Doxyfiles/auto_Doxyfile
--- OpenSceneGraph-OpenSceneGraph-3.6.5/doc/Doxyfiles/auto_Doxyfile	2020-01-31 12:03:07.000000000 +0100
+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/doc/Doxyfiles/auto_Doxyfile	2021-11-13 21:34:02.678773480 +0100
@@ -244,7 +244,7 @@ CLASS_DIAGRAMS         = YES
 MSCGEN_PATH            = 
 HIDE_UNDOC_RELATIONS   = YES
 HAVE_DOT               = YES
-DOT_FONTNAME           = FreeSans
+DOT_FONTNAME           = 
 DOT_FONTPATH           = 
 CLASS_GRAPH            = YES
 COLLABORATION_GRAPH    = NO
diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/doc/Doxyfiles/core_Doxyfile OpenSceneGraph-OpenSceneGraph-3.6.5-new/doc/Doxyfiles/core_Doxyfile
--- OpenSceneGraph-OpenSceneGraph-3.6.5/doc/Doxyfiles/core_Doxyfile	2020-01-31 12:03:07.000000000 +0100
+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/doc/Doxyfiles/core_Doxyfile	2021-11-13 21:34:02.678773480 +0100
@@ -234,7 +234,7 @@ CLASS_DIAGRAMS         = YES
 MSCGEN_PATH            = 
 HIDE_UNDOC_RELATIONS   = YES
 HAVE_DOT               = YES
-DOT_FONTNAME           = FreeSans
+DOT_FONTNAME           = 
 DOT_FONTPATH           = 
 CLASS_GRAPH            = YES
 COLLABORATION_GRAPH    = NO