diff --git a/omeroweb/webclient/forms.py b/omeroweb/webclient/forms.py
index 49e90912b2..0c16590edf 100755
--- a/omeroweb/webclient/forms.py
+++ b/omeroweb/webclient/forms.py
@@ -693,7 +693,7 @@ def __init__(self, *args, **kwargs):
                             )
                         }
                     ),
-                    initial=logicalCh.getContrastMethod(),
+                    initial=logicalCh.getContrastMethod().value,
                     label="Contrast method",
                     required=False,
                 )