macOS build fix.

diff --git a/test/video_level_test.cc b/test/video_level_test.cc
index 4ae722e7cd99f85d6148c6c87601d6eeb124d244..056a500eee130a95bb160b9814c7985776a6beea 100644 (file)
--- a/test/video_level_test.cc
+++ b/test/video_level_test.cc
@@ -57,6 +57,9 @@ using std::pair;
 using std::string;
 using boost::dynamic_pointer_cast;
 using boost::optional;
+#if BOOST_VERSION >= 106100
+using namespace boost::placeholders;
+#endif
 using boost::shared_ptr;