diff --git a/include/mcl/array.hpp b/include/mcl/array.hpp
index 5fa49e6..33d4aab 100644
--- a/include/mcl/array.hpp
+++ b/include/mcl/array.hpp
@@ -118,6 +118,7 @@ class FixedArray {
 		y = t;
 	}
 public:
+	typedef T value_type;
 	FixedArray() : n_(0) {}
 	bool resize(size_t n)
 	{
diff --git a/include/mcl/gmp_util.hpp b/include/mcl/gmp_util.hpp
index 384c052..0eeeb9c 100644
--- a/include/mcl/gmp_util.hpp
+++ b/include/mcl/gmp_util.hpp
@@ -642,7 +642,7 @@ void getNAFwidth(bool *pb, Vec& naf, mpz_class x, size_t w)
 			x++;
 			v -= maxW;
 		}
-		naf.push(pb, v);
+		naf.push(pb, Vec::value_type(v));
 		if (!*pb) return;
 		zeroNum = w - 1;
 	}