diff --git a/src/Libraries/ICSharpCode.TextEditor/Project/Src/Actions/MiscActions.cs b/src/Libraries/ICSharpCode.TextEditor/Project/Src/Actions/MiscActions.cs
index 171342cfd6..9f8ceca69c 100644
--- a/src/Libraries/ICSharpCode.TextEditor/Project/Src/Actions/MiscActions.cs
+++ b/src/Libraries/ICSharpCode.TextEditor/Project/Src/Actions/MiscActions.cs
@@ -287,7 +287,7 @@ namespace ICSharpCode.TextEditor.Actions
 			}
 			
 			string comment = null;
-			if (textArea.Document.HighlightingStrategy.Properties["LineComment"] != null) {
+			if (textArea.Document.HighlightingStrategy.Properties.ContainsKey("LineComment")) {
 				comment = textArea.Document.HighlightingStrategy.Properties["LineComment"].ToString();
 			}