diff --git a/omni.lua b/omni.lua
index c0571f1..2b8bc3a 100644
--- a/omni.lua
+++ b/omni.lua
@@ -1,3 +1,3 @@
 if omni and omni.matter then
-  omni.matter.add_resource("zircon", omni.matter.get_ore_tier("iron-ore"))
+  omni.matter.add_resource("zircon", omni.matter.get_ore_tier("iron-ore") or 1)
 end