Index: src/fileviews/ufileviewheader.pas
===================================================================
--- src/fileviews/ufileviewheader.pas	(revision 7605)
+++ src/fileviews/ufileviewheader.pas	(working copy)
@@ -72,6 +72,7 @@
     destructor Destroy; override;
 
     procedure Click; override;
+    procedure DblClick; override;
     procedure UpdateHeader;
     procedure UpdateSorting(Sorting: TFileSortings);
   end;
@@ -435,6 +436,11 @@
   end;
 end;
 
+procedure TFileViewFixedHeader.DblClick;
+begin
+  Click;
+end;
+
 procedure TFileViewFixedHeader.UpdateHeader;
 var
   I: Integer;