diff --git a/src/Main/Base/Project/Src/Bookmarks/BookmarkManager.cs b/src/Main/Base/Project/Src/Bookmarks/BookmarkManager.cs
index 074dfcdcc5..9f5321d68c 100644
--- a/src/Main/Base/Project/Src/Bookmarks/BookmarkManager.cs
+++ b/src/Main/Base/Project/Src/Bookmarks/BookmarkManager.cs
@@ -107,12 +107,10 @@ namespace ICSharpCode.SharpDevelop.Bookmarks
 		
 		public static void ToggleBookmark(ITextEditor editor, int line,
 		                                  Predicate<SDBookmark> canToggle,
-		                                  Func<Location, SDBookmark> bookmarkFactory,
-		                                  Type bookmarkType)
+		                                  Func<Location, SDBookmark> bookmarkFactory)
 		{
 			foreach (SDBookmark bookmark in GetBookmarks(new FileName(editor.FileName))) {
-				if (canToggle(bookmark) && bookmark.LineNumber == line && 
-				    bookmark.GetType().UnderlyingSystemType == bookmarkType) {
+				if (canToggle(bookmark) && bookmark.LineNumber == line) {
 					BookmarkManager.RemoveMark(bookmark);
 					return;
 				}
diff --git a/src/Main/Base/Project/Src/Bookmarks/Commands/MenuCommands.cs b/src/Main/Base/Project/Src/Bookmarks/Commands/MenuCommands.cs
index 0030e2ff88..963a65cd59 100644
--- a/src/Main/Base/Project/Src/Bookmarks/Commands/MenuCommands.cs
+++ b/src/Main/Base/Project/Src/Bookmarks/Commands/MenuCommands.cs
@@ -41,13 +41,11 @@ namespace ICSharpCode.SharpDevelop.Bookmarks
 		protected override void Run(ITextEditor editor, IBookmarkMargin bookmarkMargin)
 		{
 			BookmarkManager.ToggleBookmark(editor, editor.Caret.Line, 
-			                               b => b.CanToggle,
-			                               location => new SDBookmark(editor.FileName, location),
-			                               typeof(SDBookmark));
+			                               b => b.CanToggle && b.GetType() == typeof(SDBookmark),
+			                               location => new SDBookmark(editor.FileName, location));
 		}
 	}
-	
-	public class PrevBookmark : BookmarkMenuCommand
+		public class PrevBookmark : BookmarkMenuCommand
 	{
 		protected override void Run(ITextEditor editor, IBookmarkMargin bookmarkMargin)
 		{
diff --git a/src/Main/Base/Project/Src/Services/Debugger/DebuggerService.cs b/src/Main/Base/Project/Src/Services/Debugger/DebuggerService.cs
index e67ebec0a3..168c3f751c 100644
--- a/src/Main/Base/Project/Src/Services/Debugger/DebuggerService.cs
+++ b/src/Main/Base/Project/Src/Services/Debugger/DebuggerService.cs
@@ -227,8 +227,7 @@ namespace ICSharpCode.SharpDevelop.Debugging
 			BookmarkManager.ToggleBookmark(
 				editor, lineNumber,
 				b => b.CanToggle && b is BreakpointBookmark,
-				location => new BreakpointBookmark(editor.FileName, location, BreakpointAction.Break, "", ""),
-				typeof(BreakpointBookmark));
+				location => new BreakpointBookmark(editor.FileName, location, BreakpointAction.Break, "", ""));
 		}
 		
 		/* TODO: reimplement this stuff