diff --git a/mineleader.lua b/mineleader.lua
index 006a06b..38888f7 100644
--- a/mineleader.lua
+++ b/mineleader.lua
@@ -467,7 +467,7 @@ local function quarry(x, y, z, relative, pattern)
 		end
 		local bool reverseTrip = false;
 		for xDelta=1,math.abs(x) do
-			for zDelta=1,math.abs(z) do
+			for zDelta=1,(math.abs(z) - 1) do
 				print("X,Z: " .. xDelta .. "," .. zDelta)
 				print("heading, right heading: " .. textutils.serialiseJSON(forward) .. ", " .. textutils.serializeJSON(right))
 				local success = true;