diff --git a/phasefield/analytical.py b/phasefield/analytical.py
index 5cae60b6ea8b261eacc9fc6fb6b7ee8a2d4a6b55..36c98083bb8bfd359b9a60da4395f5b5ac49f3c2 100644
--- a/phasefield/analytical.py
+++ b/phasefield/analytical.py
@@ -49,7 +49,7 @@ def discreteLaplace(field, index, dx):
             count += 1
             result += field.neighbor(d, offset)(index)
 
-    result -= count * field.center()(index)
+    result -= count * field.center(index)
     result /= dx ** 2
     return result