diff --git a/FIBDataSet.pas b/FIBDataSet.pas
index 8c09c3a..4a4d1d1 100644
--- a/FIBDataSet.pas
+++ b/FIBDataSet.pas
@@ -963,7 +963,7 @@   TFIBCustomDataSet = class({$IFDEF TWideDataSet}TWideDataset{$ELSE}TDataset{$EN
     procedure SetBookmarkData(Buffer: TRecBuf; Data: TBookmark); override;
     {$ELSE}
     procedure InternalGotoBookmark(Bookmark: Pointer); override;
-    procedure SetBookmarkData(Buffer: TRecordBuffer; Data: Pointer);
+    procedure SetBookmarkData(Buffer: TRecordBuffer; Data: Pointer); override;
     {$ENDIF}
 
     procedure SetCachedUpdates(Value: Boolean);