diff --git a/source/main.pas b/source/main.pas
index c90e4d27..919de8a0 100644
--- a/source/main.pas
+++ b/source/main.pas
@@ -5487,6 +5487,8 @@ begin
       else
         QueryMemoLineBreaks := LineBreaks;
     end;
+    if QueryMemoLineBreaks = lbsMixed then
+      MessageDlg('This file contains mixed linebreaks. They have been converted to Windows linebreaks (CR+LF).', mtInformation, [mbOK], 0);
     SynMemoQuery.SelText := filecontent;
     SynMemoQuery.SelStart := SynMemoQuery.SelEnd;
     SynMemoQuery.EndUpdate;