diff --git a/openwrt_backup/__init__.py b/openwrt_backup/__init__.py
index edac979..5f03dcd 100644
--- a/openwrt_backup/__init__.py
+++ b/openwrt_backup/__init__.py
@@ -14,7 +14,10 @@ from openwrt_backup.prune import get_all_but_last_n
 
 
 def do_prune(dest_path: Path, n: int, dry, hostname=None):
-    to_delete = get_all_but_last_n(dest_path, n, hostname)
+    if dry:
+        to_delete = get_all_but_last_n(dest_path, n - 1, hostname)
+    else:
+        to_delete = get_all_but_last_n(dest_path, n, hostname)
     for f in to_delete:
         if dry:
             print(f"Deleting: {f}")