diff --git a/sc/source/ui/docshell/docsh.cxx b/sc/source/ui/docshell/docsh.cxx
index fd4721744e27..adb16f10827d 100644
--- a/sc/source/ui/docshell/docsh.cxx
+++ b/sc/source/ui/docshell/docsh.cxx
@@ -2382,7 +2382,7 @@ bool ScDocShell::ConvertTo( SfxMedium &rMed )
 
                 // tdf#40713: don't lose dbt file
                 // if aDbtFile corresponds exactly to aTmpFile, we just have to return
-                if (aDbtFile.GetMainURL( INetURLObject::DecodeMechanism::NONE ) == aTmpFile.GetMainURL( INetURLObject::DecodeMechanism::NONE ))
+                if (aDbtFile.GetMainURL( INetURLObject::DecodeMechanism::Unambiguous ) == aTmpFile.GetMainURL( INetURLObject::DecodeMechanism::Unambiguous ))
                     return bRet;
 
                 if ( IsDocument( aDbtFile ) && !KillFile( aDbtFile ) )