diff --git a/indra/llcommon/lluriparser.cpp b/indra/llcommon/lluriparser.cpp
index 8992355e13..bd2bb75394 100644
--- a/indra/llcommon/lluriparser.cpp
+++ b/indra/llcommon/lluriparser.cpp
@@ -131,7 +131,7 @@ void LLUriParser::textRangeToString(UriTextRangeA& textRange, std::string& str)
 		const ptrdiff_t len = textRange.afterLast - textRange.first;
 		if (len)
 		{
-			str.assign(textRange.first, uintptr_t(len));
+			str.assign(textRange.first, std::string::size_type(len));
 			return;
 		}
 	}