diff --git a/ptol.conf b/ptol.conf
index 4062b51..f2bceaa 100644
--- a/ptol.conf
+++ b/ptol.conf
@@ -2,7 +2,7 @@
 world_center=(0,0,0)
 #Volume Shape
 ##It could be "sphere" or "box"
-shape="box"
+shape=box
 #The radius between spheres or boxes
 ##for a box the "radius" is edge/2
 radius=256