diff --git a/lcl/grids.pas b/lcl/grids.pas
index 5557e2d0dc..7b3d937ac7 100644
--- a/lcl/grids.pas
+++ b/lcl/grids.pas
@@ -448,7 +448,7 @@ type
     property ImageIndex: Integer read FImageIndex write SetImageIndex default -1;
     property ImageLayout: TButtonLayout read FImageLayout write SetImageLayout default blGlyphRight;
     property Layout: TTextLayout read GetLayout write SetLayout stored IsLayoutStored;
-    property MultiLine: Boolean read FMultiLine write SetMultiLine;
+    property MultiLine: Boolean read FMultiLine write SetMultiLine default false;
     property PrefixOption: TPrefixOption read FPrefixOption write SetPrefixOption default poNone;
   end;