diff --git a/Duplicati/CommandLine/ConsoleOutput.cs b/Duplicati/CommandLine/ConsoleOutput.cs
index cd75614bc..efb1d9988 100644
--- a/Duplicati/CommandLine/ConsoleOutput.cs
+++ b/Duplicati/CommandLine/ConsoleOutput.cs
@@ -79,7 +79,7 @@ namespace Duplicati.CommandLine
 
         public void SetBackendProgress(IBackendProgress progress)
         {
-            // Not implemented.
+            // Do nothing.  Implementation needed for IMessageSink interface.
         }
 
         public void SetOperationProgress(IOperationProgress progress)
diff --git a/Duplicati/GUI/Duplicati.GUI.TrayIcon/CocoaRunner.cs b/Duplicati/GUI/Duplicati.GUI.TrayIcon/CocoaRunner.cs
index 2edfb8de6..3dc156deb 100644
--- a/Duplicati/GUI/Duplicati.GUI.TrayIcon/CocoaRunner.cs
+++ b/Duplicati/GUI/Duplicati.GUI.TrayIcon/CocoaRunner.cs
@@ -65,7 +65,7 @@ namespace Duplicati.GUI.TrayIcon
 
             public void SetIcon(MenuIcons icons)
             {
-                // Not implemented.
+                // Do nothing.  Implementation needed for IMenuItem interface.
             }
 
             public void SetEnabled(bool isEnabled)
@@ -75,7 +75,7 @@ namespace Duplicati.GUI.TrayIcon
 
             public void SetDefault(bool isDefault)
             {
-                // Not implemented.
+                // Do nothing.  Implementation needed for IMenuItem interface.
             }
             #endregion
         }
diff --git a/Duplicati/GUI/Duplicati.GUI.TrayIcon/GtkRunner.cs b/Duplicati/GUI/Duplicati.GUI.TrayIcon/GtkRunner.cs
index 7de29155b..4e9a66f30 100644
--- a/Duplicati/GUI/Duplicati.GUI.TrayIcon/GtkRunner.cs
+++ b/Duplicati/GUI/Duplicati.GUI.TrayIcon/GtkRunner.cs
@@ -162,7 +162,7 @@ namespace Duplicati.GUI.TrayIcon
 
             public void SetDefault(bool isDefault)
             {
-                // Not implemented.
+                // Do nothing.  Implementation needed for TrayIconBase interface.
             }
         }