diff --git a/init.lua b/init.lua
index f3297fd..558c40e 100644
--- a/init.lua
+++ b/init.lua
@@ -266,7 +266,7 @@ local function check_soil(pos, nodename, strength)
 
 		if math.random(1, 5) == 5 then
 			-- place random decoration (rare)
-			nod = decor[math.random(1, #decor)] or ""
+			nod = decor[math.random(1, (#decor or 1))] or ""
 		else
 			-- place random grass (common)
 			nod = #grass > 0 and grass[math.random(1, #grass)] or ""