diff --git a/deluge/plugins/blocklist/blocklist/core.py b/deluge/plugins/blocklist/blocklist/core.py
index a5166f3a7..31b603100 100644
--- a/deluge/plugins/blocklist/blocklist/core.py
+++ b/deluge/plugins/blocklist/blocklist/core.py
@@ -86,10 +86,8 @@ READERS = {
     "PeerGuardian" : PeerGuardianReader
 }
 
-# Libtorrent IP filter constants
-START = 0
-END = 1
-BLOCK = 1
+# Constants
+BLOCK_RANGE = 1
 
 class Core(CorePluginBase):
     def enable(self):
@@ -262,8 +260,9 @@ class Core(CorePluginBase):
 
     def import_list(self, force=False):
         """Imports the downloaded blocklist into the session"""
-        def on_read_ip_range(ip_range):
-            self.blocklist.add_rule(ip_range[START], ip_range[END], BLOCK)
+        def on_read_ip_range(start, end):
+            """Add ip range to blocklist"""
+            self.blocklist.add_rule(start, end, BLOCK_RANGE)
             self.num_blocked += 1
 
         def on_finish_read(result):
diff --git a/deluge/plugins/blocklist/blocklist/readers.py b/deluge/plugins/blocklist/blocklist/readers.py
index 8a51008fc..7624a3539 100644
--- a/deluge/plugins/blocklist/blocklist/readers.py
+++ b/deluge/plugins/blocklist/blocklist/readers.py
@@ -53,17 +53,18 @@ class BaseReader(object):
 
     def read(self, callback):
         """Calls callback on each ip range in the file"""
-        for ip_range in self.readranges():
-            callback(ip_range)
+        for start, end in self.readranges():
+            callback(start, end)
 
-    def is_valid(self, line):
-        return not line.startswith('#') and line.strip() != ""
+    def is_ignored(self, line):
+        """Ignore commented lines and blank lines"""
+        return line.startswith('#') or not line.strip()
 
     def readranges(self):
         """Yields each ip range from the file"""
         blocklist = self.open()
         for line in blocklist:
-            if self.is_valid(line):
+            if not self.is_ignored(line):
                 yield self.parse(line)
         blocklist.close()