diff --git a/src/modules/navigator/mission_block.cpp b/src/modules/navigator/mission_block.cpp
index d28abffc03..b7dc54f420 100644
--- a/src/modules/navigator/mission_block.cpp
+++ b/src/modules/navigator/mission_block.cpp
@@ -988,7 +988,7 @@ void MissionBlock::startPrecLand(uint16_t land_precision)
 	}
 }
 
-void MissionBlock::updateAltToAvoidTerrainCollisionAndRepublishTriplet(mission_item_s mission_item)
+void MissionBlock::updateAltToAvoidTerrainCollisionAndRepublishTriplet(const mission_item_s &mission_item)
 {
 	// Avoid flying into terrain using the distance sensor. Enable through the parameter NAV_MIN_GND_DIST.
 	// Only active during commanded descents with vz>0 (to prevent climb-aways), excluding landing and VTOL transitions.
diff --git a/src/modules/navigator/mission_block.h b/src/modules/navigator/mission_block.h
index 52f626a2fe..793e0e6bb3 100644
--- a/src/modules/navigator/mission_block.h
+++ b/src/modules/navigator/mission_block.h
@@ -198,7 +198,7 @@ protected:
 	void setLandMissionItem(mission_item_s &item, const PositionYawSetpoint &pos_yaw_sp) const;
 
 	void startPrecLand(uint16_t land_precision);
-	void updateAltToAvoidTerrainCollisionAndRepublishTriplet(mission_item_s mission_item);
+	void updateAltToAvoidTerrainCollisionAndRepublishTriplet(const mission_item_s &mission_item);
 
 	/**
 	 * @brief Issue a command for mission items with a nav_cmd that specifies an action