diff --git a/components/synedit/syneditviewedlinemap.pp b/components/synedit/syneditviewedlinemap.pp
index dbeee9107e..eafb4ea6f2 100644
--- a/components/synedit/syneditviewedlinemap.pp
+++ b/components/synedit/syneditviewedlinemap.pp
@@ -1300,8 +1300,11 @@ begin
     FCurWrappedLine := AWrappedLine;
   end;
 
-  RealIdx := FCurWrapPage.StartLine +
-    FCurWrapPage.Page.GetOffsetForWrap(AWrappedLine - FCurWrapPage.StartLine - FCurWrapPage.ViewedCountDifferenceBefore, FCurrentWrapSubline);
+  if FCurWrapPage.HasPage then
+    RealIdx := FCurWrapPage.StartLine +
+      FCurWrapPage.Page.GetOffsetForWrap(AWrappedLine - FCurWrapPage.StartLine - FCurWrapPage.ViewedCountDifferenceBefore, FCurrentWrapSubline)
+  else
+   RealIdx := AWrappedLine;
 
   inherited SetHighlighterTokensLine(RealIdx, ARealLine, AStartBytePos, ALineByteLen);
 end;