diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index db841f347f681c42c1b305c2d130ee0b55d639ae..b90ba8f6e3e0b912c711179afb73e54be5a6d7fc 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -776,6 +776,7 @@ INPUT		       += @top_srcdir@/src/entropy_floor/EAGLE
 INPUT		       += @top_srcdir@/src/star_formation/EAGLE
 INPUT		       += @top_srcdir@/src/tracers/EAGLE
 INPUT		       += @top_srcdir@/src/stars/EAGLE
+INPUT		       += @top_srcdir@/src/black_holes/Default
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses