diff --git a/builtins.txt b/builtins.txt
index 289e97d..f24ae4d 100644
--- a/builtins.txt
+++ b/builtins.txt
@@ -270,6 +270,7 @@ void llMoveToTarget( vector target, float tau )
 key llName2Key( string name )
 void llNavigateTo( vector point, list options )
 void llOffsetTexture( float u, float v, integer face )
+integer llOpenFloater( string title, string url, list params )
 void llOpenRemoteDataChannel(  )
 integer llOrd( string val, integer index )
 integer llOverMyLand( key id )
diff --git a/fndata.txt b/fndata.txt
index 6f8f973..245570b 100644
--- a/fndata.txt
+++ b/fndata.txt
@@ -1596,6 +1596,9 @@ integer llHash(string val)
 integer llOrd(string val, integer index)
 - SEF
 
+integer llOpenFloater(string title, string url, list params)
+- unstable
+
 ###################################################################
 
 # Events are SEF if a script with an empty event can't be