From a3d0e4f8c8f669fd4c0dac7a193a12148253d4e2 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@cs.cmu.edu>
Date: Thu, 3 May 2012 20:57:19 -0400
Subject: fix for older gcc

---
 dtrain/score.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'dtrain/score.cc')

diff --git a/dtrain/score.cc b/dtrain/score.cc
index 71d3e5de..7b1f6be4 100644
--- a/dtrain/score.cc
+++ b/dtrain/score.cc
@@ -103,7 +103,7 @@ SmoothBleuScorer::Score(vector<WordID>& hyp, vector<WordID>& ref,
         i_bleu[j] += (1/((score_t)j+1)) * i_ng;
       }
     }
-    sum += exp(i_bleu[i])/(pow(2, N_-i));
+    sum += exp(i_bleu[i])/(pow(2.0, static_cast<double>(N_-i)));
   }
   return brevity_penalty(hyp_len, ref_len) * sum;
 }
-- 
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