diff --git a/components/industrialstuff/source/indlcddisplay_editorform.pas b/components/industrialstuff/source/indlcddisplay_editorform.pas
index f1ec71b80..864d756e0 100644
--- a/components/industrialstuff/source/indlcddisplay_editorform.pas
+++ b/components/industrialstuff/source/indlcddisplay_editorform.pas
@@ -355,11 +355,10 @@ end;
 
 procedure TLCDCharDefsEditor.ClearEditorGrid;
 var
-  i, j: integer;
+  i: integer;
 begin
-  for i := 0 to dgDotMatrix.ColCount - 1 do
-    for j := 0 to dgDotMatrix.RowCount - 1 do
-      FTmpDotRows[j].ClearBit(i);
+  for i := 0 to High(FTmpDotRows[i]) do
+    FTmpDotRows[i] := 0;
 end;
 
 { Reads the size of the dot matrix from FLCDDisplay and use it to define the