diff --git a/libsolidity/interface/CompilerStack.cpp b/libsolidity/interface/CompilerStack.cpp
index aca9ce39e..234539ea6 100644
--- a/libsolidity/interface/CompilerStack.cpp
+++ b/libsolidity/interface/CompilerStack.cpp
@@ -481,6 +481,14 @@ Json::Value const& CompilerStack::natspec(Contract const& _contract, Documentati
 	return *(*doc);
 }
 
+Json::Value CompilerStack::functionHashes(ContractDefinition const& _contract)
+{
+	Json::Value functionHashes(Json::objectValue);
+	for (auto const& it: _contract.interfaceFunctions())
+		functionHashes[toHex(it.first.ref())] = it.second->externalSignature();
+	return functionHashes;
+}
+
 string const& CompilerStack::onChainMetadata(string const& _contractName) const
 {
 	if (m_stackState != CompilationSuccessful)
diff --git a/libsolidity/interface/CompilerStack.h b/libsolidity/interface/CompilerStack.h
index bffdeabd4..3250429b6 100644
--- a/libsolidity/interface/CompilerStack.h
+++ b/libsolidity/interface/CompilerStack.h
@@ -177,6 +177,9 @@ public:
 	/// @param type The type of the documentation to get.
 	/// Can be one of 4 types defined at @c DocumentationType
 	Json::Value const& natspec(std::string const& _contractName, DocumentationType _type) const;
+
+	Json::Value functionHashes(ContractDefinition const& _contract);
+
 	std::string const& onChainMetadata(std::string const& _contractName) const;
 	void useMetadataLiteralSources(bool _metadataLiteralSources) { m_metadataLiteralSources = _metadataLiteralSources; }
 
diff --git a/solc/CommandLineInterface.cpp b/solc/CommandLineInterface.cpp
index cae05b18c..4fbd3384d 100644
--- a/solc/CommandLineInterface.cpp
+++ b/solc/CommandLineInterface.cpp
@@ -165,6 +165,7 @@ static set<string> const g_combinedJsonArgs
 	g_strNatspecUser,
 	g_strNatspecDev,
 	g_strOpcodes,
+	g_strSignatureHashes,
 	g_strSrcMap,
 	g_strSrcMapRuntime
 };
@@ -887,6 +888,8 @@ void CommandLineInterface::handleCombinedJSON()
 			auto map = m_compiler->runtimeSourceMapping(contractName);
 			contractData[g_strSrcMapRuntime] = map ? *map : "";
 		}
+		if (requests.count(g_strSignatureHashes))
+			contractData[g_strSignatureHashes] = m_compiler->functionHashes(m_compiler->contractDefinition(contractName));
 		if (requests.count(g_strNatspecDev))
 			contractData[g_strNatspecDev] = dev::jsonCompactPrint(m_compiler->natspec(contractName, DocumentationType::NatspecDev));
 		if (requests.count(g_strNatspecUser))