diff --git a/kernel/trunk/docs/doxygen/doxygen.cfg b/kernel/trunk/docs/doxygen/doxygen.cfg
index c4fa13375a..809c47f0a0 100644
--- a/kernel/trunk/docs/doxygen/doxygen.cfg
+++ b/kernel/trunk/docs/doxygen/doxygen.cfg
@@ -899,7 +899,7 @@ FILE_PATTERNS          = *.inc *.asm
 # be searched for input files as well.
 # The default value is: NO.
 
-RECURSIVE              = NO
+RECURSIVE              = YES
 
 # The EXCLUDE tag can be used to specify files and/or directories that should be
 # excluded from the INPUT source files. This way you can easily exclude a