diff --git a/builtins.txt b/builtins.txt
index 4edcf1d..2a077f2 100644
--- a/builtins.txt
+++ b/builtins.txt
@@ -1,4 +1,4 @@
-// Generated by LSL2 Derived Files Generator. Database version: 0.0.20221115000; output module version: 0.0.20140731000
+// Generated by LSL2 Derived Files Generator. Database version: 0.0.20230203000; output module version: 0.0.20140731000
 integer llAbs( integer val )
 float llAcos( float val )
 void llAddToLandBanList( key avatar, float hours )
@@ -230,19 +230,24 @@ string llKey2Name( key id )
 key llKeyCountKeyValue(  )
 key llKeysKeyValue( integer start, integer count )
 vector llLinear2sRGB( vector color )
+void llLinkAdjustSoundVolume( integer link, float volume )
 void llLinkParticleSystem( integer linknumber, list rules )
+void llLinkPlaySound( integer link, string sound, float volume, integer flags )
+void llLinkSetSoundQueueing( integer link, integer queue )
+void llLinkSetSoundRadius( integer link, float radius )
 void llLinkSitTarget( integer link, vector offset, rotation rot )
+void llLinkStopSound( integer link )
 integer llLinksetDataAvailable(  )
 integer llLinksetDataCountKeys(  )
-integer llLinksetDataDelete( string key )
-integer llLinksetDataDeleteProtected( string key, string password )
+integer llLinksetDataDelete( string keyname )
+integer llLinksetDataDeleteProtected( string keyname, string password )
 list llLinksetDataFindKeys( string pattern, integer start, integer count )
 list llLinksetDataListKeys( integer start, integer count )
-string llLinksetDataRead( string key )
-string llLinksetDataReadProtected( string key, string password )
+string llLinksetDataRead( string keyname )
+string llLinksetDataReadProtected( string keyname, string password )
 void llLinksetDataReset(  )
-integer llLinksetDataWrite( string key, string value )
-integer llLinksetDataWriteProtected( string key, string value, string password )
+integer llLinksetDataWrite( string keyname, string value )
+integer llLinksetDataWriteProtected( string keyname, string value, string password )
 string llList2CSV( list src )
 float llList2Float( list src, integer index )
 integer llList2Integer( list src, integer index )
@@ -1170,6 +1175,10 @@ const integer SKY_SUN_TEXTURE = 21
 const integer SKY_TEXTURE_DEFAULTS = 1
 const integer SKY_TRACKS = 15
 const integer SMOOTH = 0x10
+const integer SOUND_LOOP = 0x01
+const integer SOUND_PLAY = 0x00
+const integer SOUND_SYNC = 0x04
+const integer SOUND_TRIGGER = 0x02
 const float SQRT2 = 1.41421356
 const integer STATUS_BLOCK_GRAB = 0x40
 const integer STATUS_BLOCK_GRAB_OBJECT = 0x400
@@ -1311,7 +1320,7 @@ event land_collision( vector pos )
 event land_collision_end( vector pos )
 event land_collision_start( vector pos )
 event link_message( integer sender_num, integer num, string str, key id )
-event linkset_data( integer action, string key, string value )
+event linkset_data( integer action, string keyname, string value )
 event listen( integer channel, string name, key id, string message )
 event money( key id, integer amount )
 event moving_end(  )
diff --git a/fndata.txt b/fndata.txt
index f0d65ee..fa83577 100644
--- a/fndata.txt
+++ b/fndata.txt
@@ -1650,6 +1650,17 @@ integer llOpenFloater(string title, string url, list params)
 string llGetInventoryAcquireTime(string item)
 - SEF
 
+void llLinkPlaySound(integer link, string sound, float volume, integer flags)
+
+void llLinkStopSound(integer link)
+
+void llLinkAdjustSoundVolume(integer link, float volume)
+- delay 0.1
+
+void llLinkSetSoundQueueing(integer link, integer queue)
+
+void llLinkSetSoundRadius(integer link, float radius)
+
 ###################################################################
 
 # Events are SEF if a script with an empty event can't be
diff --git a/lslopt/lslloadlib.py b/lslopt/lslloadlib.py
index 1b136ce..10ebb7a 100644
--- a/lslopt/lslloadlib.py
+++ b/lslopt/lslloadlib.py
@@ -375,7 +375,13 @@ def LoadLibrary(builtins = None, fndata = None):
                         elif match_flag.group(4):
                             flag = match_flag.group(4).lower()
                             if flag == 'unstable':
-                                functions[curr_fn]['uns'] = True
+                                if functions[curr_fn]['Type'] is None:
+                                    warning(u"unstable does not make sense"
+                                        " with void function, in line %d,"
+                                        " function %s. Omitting flag."
+                                        % (linenum, curr_fn))
+                                else:
+                                    functions[curr_fn]['uns'] = True
                             else:
                                 functions[curr_fn][flag] = True
                         elif match_flag.group(5):