diff --git a/src/modules/uORB/topics/vehicle_global_position.h b/src/modules/uORB/topics/vehicle_global_position.h
index 25137c1c64..6cbe25fbd9 100644
--- a/src/modules/uORB/topics/vehicle_global_position.h
+++ b/src/modules/uORB/topics/vehicle_global_position.h
@@ -72,6 +72,7 @@ struct vehicle_global_position_s {
 	float yaw; 			/**< Yaw in radians -PI..+PI.							   */
 	float eph;			/**< Standard deviation of position estimate horizontally */
 	float epv;			/**< Standard deviation of position vertically */
+	float terrain_alt;		/**< Terrain altitude in m, WGS84 */
 };
 
 /**