diff --git a/configurations/augsburg_validation_summer_10.conf b/configurations/augsburg_validation_summer_10.conf
index 3848780d77e262eb0dac7616501f7d346b9f15ab..c85f1740b8f9490f89d2ce5ac6b2103f8765d1e2 100644
--- a/configurations/augsburg_validation_summer_10.conf
+++ b/configurations/augsburg_validation_summer_10.conf
@@ -19,6 +19,7 @@ proj_palm = "EPSG:32633"
 proj_wgs84 = 'EPSG:4326'
 
 # vertical grid
+dz = 10.0
 nz = 80  # z in grids
 dz_stretch_level = 900.0 # in meters
 dz_stretch_factor = 1.0