diff --git a/libraries/AP_Mount/AP_Mount.cpp b/libraries/AP_Mount/AP_Mount.cpp
index 03275760ef..b00b8f87a2 100644
--- a/libraries/AP_Mount/AP_Mount.cpp
+++ b/libraries/AP_Mount/AP_Mount.cpp
@@ -621,9 +621,9 @@ MAV_RESULT AP_Mount::handle_command_do_mount_configure(const mavlink_command_lon
         return MAV_RESULT_FAILED;
     }
     _backends[_primary]->set_mode((MAV_MOUNT_MODE)packet.param1);
-    state[_primary]._stab_roll = packet.param2;
-    state[_primary]._stab_tilt = packet.param3;
-    state[_primary]._stab_pan = packet.param4;
+    state[_primary]._stab_roll.set(packet.param2);
+    state[_primary]._stab_tilt.set(packet.param3);
+    state[_primary]._stab_pan.set(packet.param4);
 
     return MAV_RESULT_ACCEPTED;
 }
diff --git a/libraries/AP_Mount/AP_Mount_Backend.cpp b/libraries/AP_Mount/AP_Mount_Backend.cpp
index aa2555f03e..1222ff7749 100644
--- a/libraries/AP_Mount/AP_Mount_Backend.cpp
+++ b/libraries/AP_Mount/AP_Mount_Backend.cpp
@@ -60,9 +60,9 @@ void AP_Mount_Backend::set_target_sysid(uint8_t sysid)
 void AP_Mount_Backend::handle_mount_configure(const mavlink_mount_configure_t &packet)
 {
     set_mode((MAV_MOUNT_MODE)packet.mount_mode);
-    _state._stab_roll = packet.stab_roll;
-    _state._stab_tilt = packet.stab_pitch;
-    _state._stab_pan = packet.stab_yaw;
+    _state._stab_roll.set(packet.stab_roll);
+    _state._stab_tilt.set(packet.stab_pitch);
+    _state._stab_pan.set(packet.stab_yaw);
 }
 
 // process MOUNT_CONTROL messages received from GCS. deprecated.