diff --git a/battery-case-generator.py b/battery-case-generator.py
index 7001e9c..ffec285 100755
--- a/battery-case-generator.py
+++ b/battery-case-generator.py
@@ -217,7 +217,7 @@ def draw_flex(t, h):
     cut    = ((h-gap) / ncut) - gap
     dx     = args.flex_width*args.thickness
     nlines = int(args.corner // dx)
-    x0     = .5*(args.corner - nlines*dx)
+    x0     = .5*(args.corner - (nlines-1)*dx)
 
     turtle.forward(x0)
     for line in range(nlines):