diff --git a/util/build_docs.py b/util/build_docs.py
index 330a604..c5dc926 100755
--- a/util/build_docs.py
+++ b/util/build_docs.py
@@ -93,6 +93,7 @@
     "testplan_definitions": [
         "hw/ip/aes/data/aes_testplan.hjson",
         "hw/ip/alert_handler/data/alert_handler_testplan.hjson",
+        "hw/ip/aon_timer/data/aon_timer_testplan.hjson",
         "hw/ip/entropy_src/data/entropy_src_testplan.hjson",
         "hw/ip/csrng/data/csrng_testplan.hjson",
         "hw/ip/edn/data/edn_testplan.hjson",