diff --git a/mine/client.lua b/mine/client.lua
index bd6adc7..a3f08e2 100644
--- a/mine/client.lua
+++ b/mine/client.lua
@@ -596,7 +596,7 @@ function doRefuel2()
     moveSafe(turtle.forward, turtle.inspect, noop)
     curfuel = turtle.getFuelLevel()
     targetfuel = 1500
-    if turtlestate["fuel"] != "" then
+    if turtlestate["fuel"] ~= "" then
         targetfuel = turtlestate["fuel"]
     end
     if curfuel > targetfuel then