diff --git a/deluge/plugins/blocklist/blocklist/core.py b/deluge/plugins/blocklist/blocklist/core.py
index c9c357c7d..ac8e47879 100644
--- a/deluge/plugins/blocklist/blocklist/core.py
+++ b/deluge/plugins/blocklist/blocklist/core.py
@@ -179,6 +179,7 @@ class Core(CorePluginBase):
                 self.core.block_ip_range(ips)
                 self.num_blocked += 1
                 ips = read_list.next()
+            read_list.close()
         except Exception, e:
             log.debug("Exception during import: %s", e)
         else: