diff --git a/audio/AudioInput.cpp b/audio/AudioInput.cpp
index c51e6e6c8c..edba5f7f33 100644
--- a/audio/AudioInput.cpp
+++ b/audio/AudioInput.cpp
@@ -64,7 +64,7 @@ void AudioInput::EnumerateDevices(std::vector<AudioInputDevice>& devs){
 #elif defined(_WIN32)
 	AudioInputWave::EnumerateDevices(devs);
 #elif defined(__linux__) && !defined(__ANDROID__)
-	return new AudioInputALSA();
+	
 #endif
 }
 
diff --git a/audio/AudioOutput.cpp b/audio/AudioOutput.cpp
index a2d06c1f78..2a27845f24 100644
--- a/audio/AudioOutput.cpp
+++ b/audio/AudioOutput.cpp
@@ -79,7 +79,7 @@ void AudioOutput::EnumerateDevices(std::vector<AudioOutputDevice>& devs){
 #elif defined(_WIN32)
 	AudioOutputWave::EnumerateDevices(devs);
 #elif defined(__linux__) && !defined(__ANDROID__)
-	return new AudioInputALSA();
+	//AudioOutputALSA::EnumerateDevices(devs);
 #endif
 }
 
diff --git a/threading.h b/threading.h
index 89ffd567d6..25ed676fec 100644
--- a/threading.h
+++ b/threading.h
@@ -46,6 +46,9 @@ public:
 	}
 	
 	~Semaphore(){
+#if ! __has_feature(objc_arc)
+        dispatch_release(sem);
+#endif
 	}
 	
 	void Acquire(){