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-rw-r--r--src/sound_asset.cc7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/sound_asset.cc b/src/sound_asset.cc
index e3b8e382..8002f37a 100644
--- a/src/sound_asset.cc
+++ b/src/sound_asset.cc
@@ -56,11 +56,12 @@ LIBDCP_ENABLE_WARNINGS
#include <stdexcept>
-using std::string;
-using std::vector;
+using std::dynamic_pointer_cast;
using std::list;
using std::shared_ptr;
-using std::dynamic_pointer_cast;
+using std::string;
+using std::vector;
+using boost::optional;
using namespace dcp;