diff --git a/components/synedit/syneditmarkup.pp b/components/synedit/syneditmarkup.pp
index 5e4360258c..9fecd960e9 100644
--- a/components/synedit/syneditmarkup.pp
+++ b/components/synedit/syneditmarkup.pp
@@ -29,10 +29,6 @@ uses
   Classes, SysUtils, Graphics, SynEditTypes, LazSynEditText, SynEditPointClasses,
   SynEditMiscClasses, Controls, SynEditHighlighter, LCLProc;
 
-type
-
-  TInvalidateLines = procedure(FirstLine, LastLine: integer) of Object;
-
 type
   TSynEditMarkupClass = class of TSynEditMarkup;