diff --git a/CHANGES.rst b/CHANGES.rst
index 8274ac210d..90a852b6c9 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -15,6 +15,7 @@ Changelog
 
 **Fixed**
 
+- #551 Traceback in Worksheet Templates list when there are Instruments assigned
 
 **Security**
 
diff --git a/bika/lims/controlpanel/bika_worksheettemplates.py b/bika/lims/controlpanel/bika_worksheettemplates.py
index 1c0769cec3..12fe641bab 100644
--- a/bika/lims/controlpanel/bika_worksheettemplates.py
+++ b/bika/lims/controlpanel/bika_worksheettemplates.py
@@ -79,7 +79,7 @@ def folderitem(self, obj, item, index):
         item['replace']['Title'] = get_link(item['url'], item['Title'])
         item['Instrument'] = ''
         instrument = obj.getInstrument()
-        item['Instrument'] = instrument and instrument.getTitle() or ''
+        item['Instrument'] = instrument and instrument.Title() or ''
         return item