diff --git a/ArduSub/Parameters.cpp b/ArduSub/Parameters.cpp
index 1638dc0628..420973ca16 100644
--- a/ArduSub/Parameters.cpp
+++ b/ArduSub/Parameters.cpp
@@ -256,7 +256,7 @@ const AP_Param::Info Sub::var_info[] = {
     // @Param: FS_EKF_ACTION
     // @DisplayName: EKF Failsafe Action
     // @Description: Controls the action that will be taken when an EKF failsafe is invoked
-    // @Values: 1:Disabled
+    // @Values: 0:Disabled, 1:Warn only, 2:Disarm
     // @User: Advanced
     GSCALAR(fs_ekf_action, "FS_EKF_ACTION",    FS_EKF_ACTION_DEFAULT),