diff --git a/netarch/ip.py b/netarch/ip.py
index 290ed3e..4381eb7 100644
--- a/netarch/ip.py
+++ b/netarch/ip.py
@@ -466,7 +466,7 @@ class ICMP_Resequence(object):
     def handle(self, frame):
         if not self.cli:
             self.cli = frame.saddr
-        idx = 1 - (self.cli == frame.saddr)
+        idx = 1 - int(self.cli == frame.saddr)
         return (idx, frame, gapstr.GapString(frame.payload))