diff --git a/double-conversion/bignum.cc b/double-conversion/bignum.cc
index c0aaadb..a7bc86d 100644
--- a/double-conversion/bignum.cc
+++ b/double-conversion/bignum.cc
@@ -31,7 +31,7 @@
 namespace double_conversion {
 
 Bignum::Bignum()
-    : bigits_(bigits_buffer_, kBigitCapacity), used_digits_(0), exponent_(0) {
+    : bigits_buffer_(), bigits_(bigits_buffer_, kBigitCapacity), used_digits_(0), exponent_(0) {
   for (int i = 0; i < kBigitCapacity; ++i) {
     bigits_[i] = 0;
   }