diff --git a/libevmasm/Assembly.cpp b/libevmasm/Assembly.cpp
index b71bc80cb..80bac3867 100644
--- a/libevmasm/Assembly.cpp
+++ b/libevmasm/Assembly.cpp
@@ -264,7 +264,7 @@ Json::Value Assembly::assemblyJSON(StringMap const& _sourceCodes) const
 					createJsonValue("PUSH [ErrorTag]", i.location().start, i.location().end, ""));
 			else
 				collection.append(
-					createJsonValue("PUSH [tag]", i.location().start, i.location().end, string(i.data())));
+					createJsonValue("PUSH [tag]", i.location().start, i.location().end, toString(i.data())));
 			break;
 		case PushSub:
 			collection.append(
@@ -290,7 +290,7 @@ Json::Value Assembly::assemblyJSON(StringMap const& _sourceCodes) const
 			break;
 		case Tag:
 			collection.append(
-				createJsonValue("tag", i.location().start, i.location().end, string(i.data())));
+				createJsonValue("tag", i.location().start, i.location().end, toString(i.data())));
 			collection.append(
 				createJsonValue("JUMPDEST", i.location().start, i.location().end));
 			break;
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 (...)
 	{