Try to fix some warnings on OS X.

2 files changed, 2 insertions, 1 deletions

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
index fc3909a8a..ca175912b 100644
--- a/src/lib/audio_mapping.cc
+++ b/src/lib/audio_mapping.cc
@@ -31,6 +31,7 @@ using std::pair;
 using std::string;
 using std::min;
 using std::vector;
+using std::abs;
 using boost::shared_ptr;
 using boost::dynamic_pointer_cast;
 
diff --git a/src/lib/audio_stream.h b/src/lib/audio_stream.h
index ea6c54ead..4dce27d4a 100644
--- a/src/lib/audio_stream.h
+++ b/src/lib/audio_stream.h
@@ -23,7 +23,7 @@
 #include "audio_mapping.h"
 #include <boost/thread/mutex.hpp>
 
-class audio_sampling_rate_test;
+struct audio_sampling_rate_test;
 
 class AudioStream
 {