diff --git a/dcm/dcm_webserver.py b/dcm/dcm_webserver.py
index 2d7edd8..6029de6 100644
--- a/dcm/dcm_webserver.py
+++ b/dcm/dcm_webserver.py
@@ -514,7 +514,7 @@ def assess_state(self):
             self.assessment_button.enable()
         else:
             self.assessment_button.disable()
-        if self.assessement is not None:
+        if self.assessment is not None:
             self.download_button.enable()
         else:
             self.download_button.disable()