diff --git a/src/u_synmemo.pas b/src/u_synmemo.pas
index 7da52438..9d9777f4 100644
--- a/src/u_synmemo.pas
+++ b/src/u_synmemo.pas
@@ -3538,6 +3538,7 @@ begin
           decCallTipsLvl;
     end;
     VK_RETURN:
+    if isDSource then
     begin
       fCanDscan:=true;
       line := LineText;