diff --git a/src/audio/AudioManager.cpp b/src/audio/AudioManager.cpp
index b9970562..987194bc 100644
--- a/src/audio/AudioManager.cpp
+++ b/src/audio/AudioManager.cpp
@@ -687,7 +687,7 @@ cAudioManager::InterrogateAudioEntities()
 }
 
 void
-cAudioManager::AddSampleToRequestedQueue()
+cAudioManager::AddSampleToRequestedQueue(uint8 unk_lcs)
 {
 	uint32 finalPriority;
 	uint8 sampleIndex;
@@ -726,6 +726,7 @@ cAudioManager::AddSampleToRequestedQueue()
 			m_sQueueSample.m_bReverb = FALSE;
 #endif
 #endif
+		m_sQueueSample.field_51_lcs = unk_lcs;
 
 		m_aRequestedQueue[m_nActiveQueue][sampleIndex] = m_sQueueSample;
 
diff --git a/src/audio/AudioManager.h b/src/audio/AudioManager.h
index f9472a52..e4256996 100644
--- a/src/audio/AudioManager.h
+++ b/src/audio/AudioManager.h
@@ -59,6 +59,7 @@ public:
 #if defined(FIX_BUGS) && defined(EXTERNAL_3D_SOUND)
 	int8 m_nEmittingVolumeChange; // same as above but for m_nEmittingVolume
 #endif
+	uint8 field_51_lcs;
 };
 
 VALIDATE_SIZE(tSound, 96);
@@ -347,7 +348,7 @@ public:
 	uint32 ComputeDopplerEffectedFrequency(uint32 oldFreq, float position1, float position2, float speedMultiplier);
 	int32 RandomDisplacement(uint32 seed);
 	void InterrogateAudioEntities(); // inlined
-	void AddSampleToRequestedQueue();
+	void AddSampleToRequestedQueue(uint8 unk_lcs = 0);
 	void AddDetailsToRequestedOrderList(uint8 sample); // inlined in vc
 #ifdef AUDIO_REFLECTIONS
 	void AddReflectionsToRequestedQueue();