diff --git a/zfs-backup.py b/zfs-backup.py
index 69a889d..95ce5da 100755
--- a/zfs-backup.py
+++ b/zfs-backup.py
@@ -244,16 +244,15 @@ class ZFS:
         ]
 
     @staticmethod
-    # TODO must take a Snapshot object
-    def destroy(full_name, *, recursive=False):
-        # TODO condition must be "begins with"
-        #   or better argument should be a ZFSPath
-        if config.local_pool_to_backup in full_name:
+    def destroy_snapshot(snapshot: Snapshot, *, recursive=False):
+        if not isinstance(snapshot, Snapshot):
+            raise TypeError("Can only destroy snapshots.")
+        if config.local_pool_to_backup == snapshot.pool:
             raise Exception(DELETE_IN_LOCAL_POOL)
         cmdline = [config.ZFS, "destroy"]
         if recursive:
             cmdline.append("-r")
-        cmdline.append(full_name)
+        cmdline.append(str(snapshot))
         run_command(cmdline)
 
     @staticmethod
@@ -477,7 +476,7 @@ class Snapshot:
         return bool(search(regex, str(self._path)))
 
     def destroy(self):
-        ZFS.destroy(str(self))
+        ZFS.destroy_snapshot(self)
 
     @property
     def pool(self) -> str: