diff --git a/lignumis/scripts/wooden-rocket-silo.lua b/lignumis/scripts/wooden-rocket-silo.lua
index 9b132a3..c0890cf 100644
--- a/lignumis/scripts/wooden-rocket-silo.lua
+++ b/lignumis/scripts/wooden-rocket-silo.lua
@@ -106,7 +106,9 @@ local function on_silo_mined(event)
     local player = game.get_player(event.player_index)
     for i, entry in pairs(storage.rocket_silos) do
         if entry.fake_silo == fake_silo then
-            player.mine_entity(entry.real_silo, true)
+            if entry.real_silo.valid then
+                player.mine_entity(entry.real_silo, true)
+            end
             table.remove(storage.rocket_silos, i)
             break
         end