diff --git a/indra/newview/llfloaterpreference.cpp b/indra/newview/llfloaterpreference.cpp
index fac12d197e63cb1de787a3cefa871e5f7c75ffc7..b4f9176f9a3e0f7a2bf8de70a79423761e7530d4 100644
--- a/indra/newview/llfloaterpreference.cpp
+++ b/indra/newview/llfloaterpreference.cpp
@@ -881,10 +881,20 @@ void LLFloaterPreference::refreshEnabledState()
 	{
 		mRadioTerrainDetail->setValue(1);
 		mRadioTerrainDetail->setEnabled(FALSE);
+		for (S32 i = 0; i < mRadioTerrainDetail->getItemCount(); ++i)
+		{
+			mRadioTerrainDetail->setIndexEnabled(i, FALSE);
+		}
 	}
 	else
 	{
 		mRadioTerrainDetail->setEnabled(TRUE);
+		
+		for (S32 i = 0; i < mRadioTerrainDetail->getItemCount(); ++i)
+		{
+			mRadioTerrainDetail->setIndexEnabled(i, TRUE);
+		}
+		
 	}
 	
 	// WindLight