diff --git a/libsolidity/AST.cpp b/libsolidity/AST.cpp
index cdbfb4e9a..0c56cb7a7 100644
--- a/libsolidity/AST.cpp
+++ b/libsolidity/AST.cpp
@@ -110,14 +110,9 @@ void FunctionDefinition::checkTypeRequirements()
 	m_body->checkTypeRequirements();
 }
 
-std::string FunctionDefinition::getCanonicalSignature()
+string FunctionDefinition::getCanonicalSignature() const
 {
-	auto parameters = getParameters();
-	std::string ret = getName() + "(";
-
-	for (auto it = parameters.cbegin(); it != parameters.cend(); ++it)
-		ret += (*it)->getType()->toString() + (it + 1 == parameters.end() ? "" : ",");
-	return ret + ")";
+	return getName() + FunctionType(*this).getCanonicalSignature();
 }
 
 void Block::checkTypeRequirements()
diff --git a/libsolidity/AST.h b/libsolidity/AST.h
index 32cc23a5b..8493d4323 100644
--- a/libsolidity/AST.h
+++ b/libsolidity/AST.h
@@ -277,11 +277,10 @@ public:
 	/// Checks that all parameters have allowed types and calls checkTypeRequirements on the body.
 	void checkTypeRequirements();
 
-	/// Returns the canonical signature of the function
-	/// That consists of the name of the function followed by the
-	/// types of the arguments separated by commas all enclosed in parentheses
-	/// without any spaces
-	std::string getCanonicalSignature();
+	/// @returns the canonical signature of the function
+	/// That consists of the name of the function followed by the types of the
+	/// arguments separated by commas all enclosed in parentheses without any spaces.
+	std::string getCanonicalSignature() const;
 
 private:
 	bool m_isPublic;
diff --git a/libsolidity/Types.cpp b/libsolidity/Types.cpp
index 640a34ca8..7a4c45c6f 100644
--- a/libsolidity/Types.cpp
+++ b/libsolidity/Types.cpp
@@ -452,13 +452,12 @@ unsigned FunctionType::getSizeOnStack() const
 	}
 }
 
-std::string FunctionType::getCanonicalSignature() const
+string FunctionType::getCanonicalSignature() const
 {
-	auto parameters = getParameterTypes();
-	std::string ret = "NAME("; //TODO: how to get function name from FunctionType
+	string ret = "(";
 
-	for (auto it = parameters.cbegin(); it != parameters.cend(); ++it)
-		ret += (*it)->toString() + (it + 1 == m_parameterTypes.end() ? "" : ",");
+	for (auto it = m_parameterTypes.cbegin(); it != m_parameterTypes.cend(); ++it)
+		ret += (*it)->toString() + (it + 1 == m_parameterTypes.cend() ? "" : ",");
 
 	return ret + ")";
 }
diff --git a/test/SolidityNameAndTypeResolution.cpp b/test/SolidityNameAndTypeResolution.cpp
index e44c9fa29..94271b1f7 100644
--- a/test/SolidityNameAndTypeResolution.cpp
+++ b/test/SolidityNameAndTypeResolution.cpp
@@ -336,7 +336,24 @@ BOOST_AUTO_TEST_CASE(function_canonical_signature)
 		if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
 		{
 			auto functions = contract->getDefinedFunctions();
-			BOOST_ASSERT("foo(uint256,uint64,bool)" == functions[0]->getCanonicalSignature());
+			BOOST_CHECK_EQUAL("foo(uint256,uint64,bool)", functions[0]->getCanonicalSignature());
+		}
+}
+
+BOOST_AUTO_TEST_CASE(function_canonical_signature_type_aliases)
+{
+	ASTPointer<SourceUnit> sourceUnit;
+	char const* text = "contract Test {\n"
+					   "  function boo(uint arg1, hash arg2, address arg3) returns (uint ret) {\n"
+					   "    ret = 5;\n"
+					   "  }\n"
+					   "}\n";
+	BOOST_CHECK_NO_THROW(sourceUnit = parseTextAndResolveNames(text));
+	for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
+		if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
+		{
+			auto functions = contract->getDefinedFunctions();
+			BOOST_CHECK_EQUAL("boo(uint256,hash256,address)", functions[0]->getCanonicalSignature());
 		}
 }