diff --git a/doc/Doxyfile.nvme b/doc/Doxyfile.nvme
index 7b8fdb367..2e2290e31 100644
--- a/doc/Doxyfile.nvme
+++ b/doc/Doxyfile.nvme
@@ -648,7 +648,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT                  = ../lib/nvme nvme.index.txt
+INPUT                  = ../lib/nvme ../include/spdk nvme.index.txt
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is