diff --git a/components/fpspreadsheet/source/common/fpspreadsheet.pas b/components/fpspreadsheet/source/common/fpspreadsheet.pas
index 4085d00d8..688dcea39 100644
--- a/components/fpspreadsheet/source/common/fpspreadsheet.pas
+++ b/components/fpspreadsheet/source/common/fpspreadsheet.pas
@@ -8396,6 +8396,7 @@ begin
         Recalc;
       FFormatID := AFormatID;
     finally
+      FReadWriteFlag := rwfNormal;
       dec(FLockCount);
       if ok and Assigned(FOnOpenWorkbook) then   // ok is true if stream has been read successfully
         FOnOpenWorkbook(self);   // send common notification