diff --git a/conf.py b/conf.py
index abee78aba9..3b29986c06 100644
--- a/conf.py
+++ b/conf.py
@@ -125,6 +125,7 @@ exclude_patterns = ["**/build*",
                     "ports/cc3200",
                     "ports/cc3200/FreeRTOS",
                     "ports/cc3200/hal",
+                    "ports/cxd56/mkspk",
                     "ports/cxd56/spresense-exported-sdk",
                     "ports/esp32",
                     "ports/esp8266/boards",