diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index 3fc900be..39463a2f 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -837,11 +837,7 @@ FILE_PATTERNS          = *.c \
                          *.C++ \
                          *.H \
                          *.HH \
-                         *.H++ \
-                         *.dox \
-                         RECURSIVE \
-                         = \
-                         NO
+                         *.H++
 
 # The RECURSIVE tag can be used to specify whether or not subdirectories should
 # be searched for input files as well.