diff --git a/libsolidity/inlineasm/AsmParser.cpp b/libsolidity/inlineasm/AsmParser.cpp
index d3b0808b4..db1c57370 100644
--- a/libsolidity/inlineasm/AsmParser.cpp
+++ b/libsolidity/inlineasm/AsmParser.cpp
@@ -606,7 +606,8 @@ bool Parser::isValidNumberLiteral(string const& _literal)
 {
 	try
 	{
-		u256(_literal);
+		u256 v(_literal);
+		(void)v;
 	}
 	catch (...)
 	{