diff --git a/python/examples/pizza/gl.py b/python/examples/pizza/gl.py
index 765653c9836d7be4cde8e3fdc9c5a76f685b1e69..908db67052e1db71ef0f4fbfcfea2c8f2cc9a955 100644
--- a/python/examples/pizza/gl.py
+++ b/python/examples/pizza/gl.py
@@ -638,7 +638,7 @@ class gl:
                           fraction*(self.scale_stop - self.scale_start)
           self.viewupright()
 
-	if n == nstart or self.panflag: self.center = compute_center(box)
+        if n == nstart or self.panflag: self.center = compute_center(box)
 
         if bonds: self.bonds_augment(bonds)