diff --git a/indra/llcommon/llstring.cpp b/indra/llcommon/llstring.cpp
index 76979f29f644df1effc3ac0e9abc10a0f1bf11b3..617969ab2a27f0c032ae8cf0645837c2fab2b796 100755
--- a/indra/llcommon/llstring.cpp
+++ b/indra/llcommon/llstring.cpp
@@ -1397,7 +1397,7 @@ void LLStringUtilBase<T>::testHarness()
 	
 	s2.erase( 4, 1 );
 	llassert( s2 == "hell");
-	s2.insert( 0, 'y' );
+	s2.insert( 0, "y" );
 	llassert( s2 == "yhell");
 	s2.erase( 1, 3 );
 	llassert( s2 == "yl");