diff --git a/cd.sh b/cd.sh
index 9ed590c..5f799d4 100644
--- a/cd.sh
+++ b/cd.sh
@@ -65,7 +65,7 @@ Acquire::Check-Valid-Until True;
 APT::Get::Show-Versions True;
 APT::Install-Recommends False;
 APT::Install-Suggests False;
-Dir::Etc::SourceParts '';
+Dir::Etc::SourceParts \"\";
 "
         ;;
         *) exit 1 ;;