diff --git a/src/modules/mavlink/mavlink_messages.cpp b/src/modules/mavlink/mavlink_messages.cpp
index b9cdfcd1565840bcf476c6f86ecdd8d1baa15cfd..7fa642696c47395ec5154536266c436c98fdb758 100644
--- a/src/modules/mavlink/mavlink_messages.cpp
+++ b/src/modules/mavlink/mavlink_messages.cpp
@@ -2688,6 +2688,8 @@ protected:
 					msg.approach_y = 0.0f;
 					msg.approach_z = 0.0f;
 
+					msg.time_usec = hrt_absolute_time();
+
 					mavlink_msg_home_position_send_struct(_mavlink->get_channel(), &msg);
 
 					return true;
@@ -3407,7 +3409,7 @@ protected:
 
 			/* send override message - harmless if connected to GCS, allows to connect a board to a Linux system */
 			/* http://mavlink.org/messages/common#RC_CHANNELS_OVERRIDE */
-			mavlink_rc_channels_override_t over;
+			mavlink_rc_channels_override_t over = {};
 			over.target_system = mavlink_system.sysid;
 			over.target_component = 0;
 			over.chan1_raw = msg.chan1_raw;
diff --git a/src/modules/mavlink/mavlink_mission.cpp b/src/modules/mavlink/mavlink_mission.cpp
index 5a5b7c674bfe8f68fa8cda52143f68939f3aed07..a0faa69e2815abd90523aa620b1d2fb90ad844ef 100644
--- a/src/modules/mavlink/mavlink_mission.cpp
+++ b/src/modules/mavlink/mavlink_mission.cpp
@@ -368,7 +368,7 @@ MavlinkMissionManager::send_mission_item(uint8_t sysid, uint8_t compid, uint16_t
 		_time_last_sent = hrt_absolute_time();
 
 		if (_int_mode) {
-			mavlink_mission_item_int_t wp;
+			mavlink_mission_item_int_t wp = {};
 			format_mavlink_mission_item(&mission_item, reinterpret_cast<mavlink_mission_item_t *>(&wp));
 
 			wp.target_system = sysid;
@@ -381,7 +381,7 @@ MavlinkMissionManager::send_mission_item(uint8_t sysid, uint8_t compid, uint16_t
 			PX4_DEBUG("WPM: Send MISSION_ITEM_INT seq %u to ID %u", wp.seq, wp.target_system);
 
 		} else {
-			mavlink_mission_item_t wp;
+			mavlink_mission_item_t wp = {};
 			format_mavlink_mission_item(&mission_item, &wp);
 
 			wp.target_system = sysid;