diff --git a/python/dune/perftool/sumfact/amatrix.py b/python/dune/perftool/sumfact/amatrix.py
index b30b5b6e37b3d4592a6040d36324ff63a05155e0..f1b8a6209591b08b543b3a906dec037bbecf1da4 100644
--- a/python/dune/perftool/sumfact/amatrix.py
+++ b/python/dune/perftool/sumfact/amatrix.py
@@ -32,7 +32,7 @@ def quadrature_points_per_direction():
     q = 2
 
     # Quadrature points in per direction
-    nb_qp = q / 2 + 1
+    nb_qp = q // 2 + 1
 
     return nb_qp