diff --git a/backup.nix b/backup.nix
index d2df465..94a376d 100644
--- a/backup.nix
+++ b/backup.nix
@@ -18,7 +18,7 @@ let
         if [ $rc -ne 0 ]; then
           echo "Backup of $i failed with exit code $rc:"
           echo "$output"
-          exit_code="$rc"
+          exit_code=1;
         else
           echo "Backup of $i successful:"
           echo "$output"