diff --git a/src/u_sxsyn.pas b/src/u_sxsyn.pas
index e209fe7b..4cd7d4b0 100644
--- a/src/u_sxsyn.pas
+++ b/src/u_sxsyn.pas
@@ -169,15 +169,13 @@ end;
 function TSynSxSynRange.Compare(range: TSynCustomHighlighterRange): integer;
 begin
   result := inherited Compare(range);
-  assert(range <> nil);
-  if not result.equals(0) then
-    exit;
-  if range is TSynSxSynRange then
-    result := integer(rangeKind = TSynSxSynRange(range).rangeKind);
+  if (range is TSynSxSynRange) and (rangeKind = TSynSxSynRange(range).rangeKind) then
+    result := 1;
 end;
 
 procedure TSynSxSynRange.Clear;
 begin
+  inherited;
   rangeKind := TRangeKind.rkNone;
 end;