diff --git a/bids-validator/bids_validator/rules/session_level_rules.json b/bids-validator/bids_validator/rules/session_level_rules.json
index 683bb81be..2869309d6 100644
--- a/bids-validator/bids_validator/rules/session_level_rules.json
+++ b/bids-validator/bids_validator/rules/session_level_rules.json
@@ -7,7 +7,7 @@
   },
 
   "func_ses": {
-    "regexp": "^[\\/\\\\](sub-[a-zA-Z0-9]+)[\\/\\\\](?:(ses-[a-zA-Z0-9]+)[\\/\\\\])?\\1(_\\2)?task-[a-zA-Z0-9]+(?:_acq-[a-zA-Z0-9]+)?(?:_rec-[a-zA-Z0-9]+)?(?:_run-[0-9]+)?(?:_echo-[0-9]+)?(@@@_func_ses_ext_@@@)$",
+    "regexp": "^[\\/\\\\](sub-[a-zA-Z0-9]+)[\\/\\\\](?:(ses-[a-zA-Z0-9]+)[\\/\\\\])?\\1(_\\2)?_task-[a-zA-Z0-9]+(?:_acq-[a-zA-Z0-9]+)?(?:_rec-[a-zA-Z0-9]+)?(?:_run-[0-9]+)?(?:_echo-[0-9]+)?(@@@_func_ses_ext_@@@)$",
     "tokens": {
       "@@@_func_ses_ext_@@@": [
         "_bold\\.json",