diff --git a/securedrop_client/gui/widgets.py b/securedrop_client/gui/widgets.py
index 9a214df52..b90b78850 100644
--- a/securedrop_client/gui/widgets.py
+++ b/securedrop_client/gui/widgets.py
@@ -841,16 +841,14 @@ class SourceList(QListWidget):
     Displays the list of sources.
     """
 
-    # Thick 500px border in QListView::item:selected is a workaround.
-    # See https://github.com/freedomofpress/securedrop-client/issues/331
     CSS = '''
     QListView {
         border: none;
-        show-decoration-selected: 1;
+        show-decoration-selected: 0;
         border-right: 3px solid #f3f5f9;
     }
     QListView::item:selected {
-        border: 500px solid #f3f5f9;
+        background-color: #f3f5f9;
     }
     '''