diff --git a/libsolidity/Compiler.cpp b/libsolidity/Compiler.cpp
index f6f48a8c2..28a9b3d10 100644
--- a/libsolidity/Compiler.cpp
+++ b/libsolidity/Compiler.cpp
@@ -43,9 +43,13 @@ void Compiler::compileContract(ContractDefinition const& _contract,
 
 	for (ContractDefinition const* contract: _contract.getLinearizedBaseContracts())
 	{
-		for (ASTPointer<FunctionDefinition> const& function: contract->getDefinedFunctions())
-			if (!function->isConstructor())
-				m_context.addFunction(*function);
+		for (auto const& it: contract->getInterfaceFunctions())
+		{
+			auto funcDef = it.second.getFunctionDefinition();
+			if (funcDef && funcDef->isConstructor())
+				continue;
+			m_context.addFunction(*it.second.getDeclaration());
+		}
 		for (ASTPointer<ModifierDefinition> const& modifier: contract->getFunctionModifiers())
 			m_context.addModifier(*modifier);
 	}
diff --git a/libsolidity/CompilerContext.cpp b/libsolidity/CompilerContext.cpp
index 4edced940..ea349c0d2 100644
--- a/libsolidity/CompilerContext.cpp
+++ b/libsolidity/CompilerContext.cpp
@@ -59,11 +59,11 @@ void CompilerContext::addAndInitializeVariable(VariableDeclaration const& _decla
 		*this << u256(0);
 }
 
-void CompilerContext::addFunction(FunctionDefinition const& _function)
+void CompilerContext::addFunction(Declaration const& _decl)
 {
 	eth::AssemblyItem tag(m_asm.newTag());
-	m_functionEntryLabels.insert(make_pair(&_function, tag));
-	m_virtualFunctionEntryLabels.insert(make_pair(_function.getName(), tag));
+	m_functionEntryLabels.insert(make_pair(&_decl, tag));
+	m_virtualFunctionEntryLabels.insert(make_pair(_decl.getName(), tag));
 }
 
 void CompilerContext::addModifier(ModifierDefinition const& _modifier)
diff --git a/libsolidity/CompilerContext.h b/libsolidity/CompilerContext.h
index aa438cf02..42ac9ee82 100644
--- a/libsolidity/CompilerContext.h
+++ b/libsolidity/CompilerContext.h
@@ -44,7 +44,7 @@ public:
 	void startNewFunction() { m_localVariables.clear(); m_asm.setDeposit(0); }
 	void addVariable(VariableDeclaration const& _declaration, unsigned _offsetToCurrent = 0);
 	void addAndInitializeVariable(VariableDeclaration const& _declaration);
-	void addFunction(FunctionDefinition const& _function);
+	void addFunction(Declaration const& _decl);
 	/// Adds the given modifier to the list by name if the name is not present already.
 	void addModifier(ModifierDefinition const& _modifier);