diff --git a/fsl/data/featdesign.py b/fsl/data/featdesign.py
index c271fc59e5b13252f65d4abb8c0e031828ee671b..0a3de55e604af65013573a243f9cbed271b3f944 100644
--- a/fsl/data/featdesign.py
+++ b/fsl/data/featdesign.py
@@ -229,7 +229,7 @@ class FEATFSFDesign(object):
                             'for ev {}'.format(ev.index))
                 continue
 
-            design[:, ev.index] = ev.image.data[x, y, z, :]
+            design[:, ev.index] = ev.image[x, y, z, :]
 
         return design