diff --git a/source/lessons/L6/zonal-statistics.rst b/source/lessons/L6/zonal-statistics.rst
index 68492e0..2348959 100644
--- a/source/lessons/L6/zonal-statistics.rst
+++ b/source/lessons/L6/zonal-statistics.rst
@@ -62,7 +62,7 @@ Quite often you have a situtation when you want to summarize raster datasets bas
 .. ipython:: python
 
     array = dem.read(1)
-    affine = dem.affine
+    affine = dem.transform
 
 - Now we can calculate the zonal statistics by using the function ``zonal_stats``.
 
@@ -78,4 +78,4 @@ Okey. So what do we have now?
     print(zs_kallio)
     print(zs_pihla)
 
-Super! Now we can see that ``Pihlajamäki`` seems to be slightly higher compared to ``Kallio``.
\ No newline at end of file
+Super! Now we can see that ``Pihlajamäki`` seems to be slightly higher compared to ``Kallio``.