diff --git a/libevmasm/Assembly.cpp b/libevmasm/Assembly.cpp
index 8c1f92965..696ab0b35 100644
--- a/libevmasm/Assembly.cpp
+++ b/libevmasm/Assembly.cpp
@@ -210,7 +210,7 @@ ostream& Assembly::streamAsm(ostream& _out, string const& _prefix, StringMap con
 	return _out;
 }
 
-Json::Value Assembly::createJsonValue(string _name, int _begin, int _end, string _value, string _jumpType) const
+Json::Value Assembly::createJsonValue(string _name, int _begin, int _end, string _value, string _jumpType)
 {
 	Json::Value value;
 	value["name"] = _name;
@@ -223,7 +223,7 @@ Json::Value Assembly::createJsonValue(string _name, int _begin, int _end, string
 	return value;
 }
 
-string toStringInHex(u256 _value)
+string Assembly::toStringInHex(u256 _value)
 {
 	std::stringstream hexStr;
 	hexStr << hex << _value;
diff --git a/libevmasm/Assembly.h b/libevmasm/Assembly.h
index 680cb1af2..8116c2cea 100644
--- a/libevmasm/Assembly.h
+++ b/libevmasm/Assembly.h
@@ -138,7 +138,8 @@ protected:
 private:
 	Json::Value streamAsmJson(std::ostream& _out, StringMap const& _sourceCodes) const;
 	std::ostream& streamAsm(std::ostream& _out, std::string const& _prefix, StringMap const& _sourceCodes) const;
-	Json::Value createJsonValue(std::string _name, int _begin, int _end, std::string _value = std::string(), std::string _jumpType = std::string()) const;
+	static Json::Value createJsonValue(std::string _name, int _begin, int _end, std::string _value = std::string(), std::string _jumpType = std::string());
+	static std::string toStringInHex(u256 _value);
 
 protected:
 	/// 0 is reserved for exception