diff --git a/src/spaceObjects/planet.cpp b/src/spaceObjects/planet.cpp
index 68299497a0..1cb870b32a 100644
--- a/src/spaceObjects/planet.cpp
+++ b/src/spaceObjects/planet.cpp
@@ -116,6 +116,7 @@ Planet::Planet()
     cloud_texture = "";
     atmosphere_texture = "";
     atmosphere_color = sf::Color(0, 0, 0);
+    atmosphere_size = 0;
     distance_from_movement_plane = 0;
     axial_rotation_time = 0.0;
     orbit_target_id = -1;
diff --git a/src/spaceObjects/playerSpaceship.h b/src/spaceObjects/playerSpaceship.h
index 253c41516c..0339451354 100644
--- a/src/spaceObjects/playerSpaceship.h
+++ b/src/spaceObjects/playerSpaceship.h
@@ -167,7 +167,7 @@ class PlayerSpaceship : public SpaceShip
 
     EAlertLevel alert_level;
 
-    int32_t linked_science_probe_id;
+    int32_t linked_science_probe_id = -1;
 
     PlayerSpaceship();
     virtual ~PlayerSpaceship();