diff --git a/res/content/base/modules/util.lua b/res/content/base/modules/util.lua
index b1a97ad06..1044eb394 100644
--- a/res/content/base/modules/util.lua
+++ b/res/content/base/modules/util.lua
@@ -12,14 +12,14 @@ function util.drop(ppos, itemid, count, data, pickup_delay)
     }})
 end
 
-local function calc_loot(loot_table)
+function calc_loot(loot_table)
     local results = {}
     for _, loot in ipairs(loot_table) do
         local chance = loot.chance or 1
         local count = loot.count or 1
-        
+
         local roll = math.random()
-        
+
         if roll < chance then
             if loot.min and loot.max then
                 count = math.random(loot.min, loot.max)
diff --git a/res/content/base/scripts/grass_block.lua b/res/content/base/scripts/grass_block.lua
index fb7482c20..b5965de43 100644
--- a/res/content/base/scripts/grass_block.lua
+++ b/res/content/base/scripts/grass_block.lua
@@ -1,3 +1,6 @@
+local dirtid = block.index("base:dirt")
+local grass_blockid = block.index("base:grass_block")
+
 local offsets = {}
 for lx=-1,1 do
     for ly=-1,1 do
@@ -8,18 +11,17 @@ for lx=-1,1 do
 end
 
 function on_random_update(x, y, z)
-    local dirtid = block.index('base:dirt');
     if block.is_solid_at(x, y+1, z) then
         block.set(x, y, z, dirtid, 0)
         return
     end
-    local grassblockid = block.index('base:grass_block')
+
     for _, offset in ipairs(offsets) do
         local nx, ny, nz = x + offset[1], y + offset[2], z + offset[3]
 
         if block.get(nx, ny, nz) == dirtid and
         not block.is_solid_at(nx, ny + 1, nz) then
-            block.set(nx, ny, nz, grassblockid, 0)
+            block.set(nx, ny, nz, grass_blockid, 0)
             return
         end
     end