diff --git a/libs/turtle-utils.lua b/libs/turtle-utils.lua
index 13a9b22..e1e4e42 100644
--- a/libs/turtle-utils.lua
+++ b/libs/turtle-utils.lua
@@ -315,8 +315,8 @@ turtleUtils.refuelWithBuffer = function(sideFuel, sideBuffer, minFuelNeeded, sle
     return false, 'refuelWithBuffer: sideBuffer should be "front", "top" or "bottom"'
   end
 
-  local fuelInventory = waitForInventory(sideFuel, sleepTime)
-  local bufferInventory = waitForInventory(sideBuffer, sleepTime)
+  local fuelInventory = turtleUtils.waitForInventory(sideFuel, sleepTime)
+  local bufferInventory = turtleUtils.waitForInventory(sideBuffer, sleepTime)
 
   local ok, errMessage = turtleUtils.refuel(minFuelNeeded, function()
     local fuelSlot = findFuelSlot(fuelInventory)