diff --git a/AST.cpp b/AST.cpp
index 59a7b61c2..2c4dbd9d6 100644
--- a/AST.cpp
+++ b/AST.cpp
@@ -124,6 +124,12 @@ FunctionDefinition const* ContractDefinition::getConstructor() const
 	return nullptr;
 }
 
+FixedHash<4> ContractDefinition::getConstructorsInterface() const
+{
+	return FixedHash<4>(dev::sha3(getConstructor()->externalSignature()));
+	//return hash;
+}
+
 FunctionDefinition const* ContractDefinition::getFallbackFunction() const
 {
 	for (ContractDefinition const* contract: getLinearizedBaseContracts())
diff --git a/AST.h b/AST.h
index c9ad6447e..5620fa5e4 100644
--- a/AST.h
+++ b/AST.h
@@ -281,6 +281,9 @@ public:
 	/// Returns the fallback function or nullptr if no fallback function was specified.
 	FunctionDefinition const* getFallbackFunction() const;
 
+	///@returns hash of the constructor
+	FixedHash<4> getConstructorsInterface() const;
+
 private:
 	/// Checks that two functions defined in this contract with the same name have different
 	/// arguments and that there is at most one constructor.
diff --git a/InterfaceHandler.cpp b/InterfaceHandler.cpp
index ea787c282..d68f9dbea 100644
--- a/InterfaceHandler.cpp
+++ b/InterfaceHandler.cpp
@@ -38,7 +38,17 @@ std::unique_ptr<std::string> InterfaceHandler::getDocumentation(ContractDefiniti
 std::unique_ptr<std::string> InterfaceHandler::getABIInterface(ContractDefinition const& _contractDef)
 {
 	Json::Value abi(Json::arrayValue);
-	for (auto const& it: _contractDef.getInterfaceFunctions())
+	auto allFunctions = _contractDef.getInterfaceFunctions();
+
+	FunctionTypePointer functionTypePointer = nullptr;
+	if (_contractDef.getConstructor())
+	{
+		functionTypePointer = make_shared<FunctionType>(*_contractDef.getConstructor(), false);
+		allFunctions.insert(make_pair(_contractDef.getConstructorsInterface(), functionTypePointer));
+	}
+
+	//allFunctions.insert(_contractDef.getConstructor());
+	for (auto it: allFunctions)
 	{
 		auto populateParameters = [](vector<string> const& _paramNames, vector<string> const& _paramTypes)
 		{
@@ -55,7 +65,7 @@ std::unique_ptr<std::string> InterfaceHandler::getABIInterface(ContractDefinitio
 		};
 
 		Json::Value method;
-		method["type"] = "function";
+		method["type"] = (functionTypePointer == it.second ? "constructor" : "function");
 		method["name"] = it.second->getDeclaration().getName();
 		method["constant"] = it.second->isConstant();
 		method["inputs"] = populateParameters(it.second->getParameterNames(),