diff --git a/deluge/plugins/blocklist/blocklist/core.py b/deluge/plugins/blocklist/blocklist/core.py
index 62e972c23..d062b4b7f 100644
--- a/deluge/plugins/blocklist/blocklist/core.py
+++ b/deluge/plugins/blocklist/blocklist/core.py
@@ -170,6 +170,7 @@ class Core(CorePluginBase):
             read_list = FORMATS[self.config["listtype"]][1](bl_file)
         except Exception, e:
             log.debug("Unable to read blocklist file: %s", e)
+            self.is_importing = False
             return
 
         try: