diff --git a/libraries/AP_Mount/AP_Mount_Params.cpp b/libraries/AP_Mount/AP_Mount_Params.cpp
index 30d14960a78fe..6b900c61fe557 100644
--- a/libraries/AP_Mount/AP_Mount_Params.cpp
+++ b/libraries/AP_Mount/AP_Mount_Params.cpp
@@ -172,6 +172,14 @@ const AP_Param::GroupInfo AP_Mount_Params::var_info[] = {
     // @User: Standard
     AP_GROUPINFO("_OPTIONS", 16, AP_Mount_Params, options, 0),
 
+    // @Param: _OPTIONS
+    // @DisplayName: Mount override byte
+    // @Description: Mount override byte
+    // @User: Standard
+    AP_GROUPINFO("_OVR_BYTE", 17, AP_Mount_Params, override_byte, 0),
+
+    AP_GROUPINFO("_OVR_VAL", 18, AP_Mount_Params, override_value, 0),
+
     AP_GROUPEND
 };
 
diff --git a/libraries/AP_Mount/AP_Mount_Params.h b/libraries/AP_Mount/AP_Mount_Params.h
index ccf42c1fe050c..b6cd2e45d54ca 100644
--- a/libraries/AP_Mount/AP_Mount_Params.h
+++ b/libraries/AP_Mount/AP_Mount_Params.h
@@ -32,4 +32,8 @@ class AP_Mount_Params {
     AP_Int8     sysid_default;      // target sysid for mount to follow
     AP_Int32    dev_id;             // Device id taking into account bus
     AP_Int8     options;            // mount options bitmask
+
+    // debug parameters
+    AP_Int8     override_byte;      // byte to override in the set_attitude command
+    AP_Int16    override_value;     // value to override in the set_attitude command
 };