X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/9fe2e812f140d580d1150ffcb5010515d8b68dae..601ec68eda2cd99ae1b5dc1cfbc7749c92912802:/utils/gcm-ref

diff --git a/utils/gcm-ref b/utils/gcm-ref
index ccbf4321..4a53737b 100755
--- a/utils/gcm-ref
+++ b/utils/gcm-ref
@@ -54,7 +54,7 @@ def poly(nbits):
   base = C.GF(0).setbit(nbits).setbit(0)
   for k in xrange(1, nbits, 2):
     for cc in combs(range(1, nbits), k):
-      p = base + sum(C.GF(0).setbit(c) for c in cc)
+      p = base + sum((C.GF(0).setbit(c) for c in cc), C.GF(0))
       if p.irreduciblep(): POLYMAP[nbits] = p; return p
   raise ValueError, nbits