diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index c29a3a0035..72d2e1aba0 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -10314,6 +10314,17 @@
       <key>Value</key>
       <integer>1</integer>
     </map>
+    <key>VoiceDefaultInternalLevel</key>
+    <map>
+      <key>Comment</key>
+      <string>Internal level of voice set by default. Is equivalent to 0.5 (from 0.0-1.0 range) external voice level (internal = 400 * external^2).</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>S32</string>
+      <key>Value</key>
+      <integer>100</integer>
+    </map>
     <key>VoiceEarLocation</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llmutelist.cpp b/indra/newview/llmutelist.cpp
index 8e9fa97faf..c1666f5666 100644
--- a/indra/newview/llmutelist.cpp
+++ b/indra/newview/llmutelist.cpp
@@ -57,14 +57,10 @@
 
 #include "llagent.h"
 #include "llviewergenericmessage.h"	// for gGenericDispatcher
-#include "llviewerwindow.h"
 #include "llworld.h" //for particle system banning
-#include "llchat.h"
 #include "llimpanel.h"
 #include "llimview.h"
 #include "llnotifications.h"
-#include "lluistring.h"
-#include "llviewerobject.h" 
 #include "llviewerobjectlist.h"
 #include "lltrans.h"
 
diff --git a/indra/newview/llvoiceclient.cpp b/indra/newview/llvoiceclient.cpp
index 68b271d6cb..8ca0fd6ef6 100644
--- a/indra/newview/llvoiceclient.cpp
+++ b/indra/newview/llvoiceclient.cpp
@@ -1153,7 +1153,7 @@ void LLSpeakerVolumeStorage::storeSpeakerVolume(const LLUUID& speaker_id, S32 vo
 S32 LLSpeakerVolumeStorage::getSpeakerVolume(const LLUUID& speaker_id)
 {
 	// default internal level of user voice.
-	static const S32 DEFAULT_INTERNAL_VOLUME_LEVEL = 100;
+	const static LLUICachedControl<S32> DEFAULT_INTERNAL_VOLUME_LEVEL("VoiceDefaultInternalLevel", 100);
 	S32 ret_val = DEFAULT_INTERNAL_VOLUME_LEVEL;
 	speaker_data_map_t::const_iterator it = mSpeakersData.find(speaker_id);