diff --git a/libevmasm/ConstantOptimiser.cpp b/libevmasm/ConstantOptimiser.cpp
index a7a87c35b..2efd2dc9c 100644
--- a/libevmasm/ConstantOptimiser.cpp
+++ b/libevmasm/ConstantOptimiser.cpp
@@ -159,7 +159,7 @@ AssemblyItems CodeCopyMethod::execute(Assembly& _assembly) const
 	return actualCopyRoutine;
 }
 
-AssemblyItems const& CodeCopyMethod::copyRoutine() const
+AssemblyItems const& CodeCopyMethod::copyRoutine()
 {
 	AssemblyItems static copyRoutine{
 		u256(0),
@@ -234,7 +234,7 @@ AssemblyItems ComputeMethod::findRepresentation(u256 const& _value)
 	}
 }
 
-bool ComputeMethod::checkRepresentation(u256 const& _value, AssemblyItems const& _routine) const
+bool ComputeMethod::checkRepresentation(u256 const& _value, AssemblyItems const& _routine)
 {
 	// This is a tiny EVM that can only evaluate some instructions.
 	vector<u256> stack;
diff --git a/libevmasm/ConstantOptimiser.h b/libevmasm/ConstantOptimiser.h
index 19f14f7a0..82982e258 100644
--- a/libevmasm/ConstantOptimiser.h
+++ b/libevmasm/ConstantOptimiser.h
@@ -121,7 +121,7 @@ public:
 	virtual AssemblyItems execute(Assembly& _assembly) const override;
 
 protected:
-	AssemblyItems const& copyRoutine() const;
+	static AssemblyItems const& copyRoutine();
 };
 
 /**
@@ -151,7 +151,7 @@ protected:
 	/// Tries to recursively find a way to compute @a _value.
 	AssemblyItems findRepresentation(u256 const& _value);
 	/// Recomputes the value from the calculated representation and checks for correctness.
-	bool checkRepresentation(u256 const& _value, AssemblyItems const& _routine) const;
+	static bool checkRepresentation(u256 const& _value, AssemblyItems const& _routine);
 	bigint gasNeeded(AssemblyItems const& _routine) const;
 
 	/// Counter for the complexity of optimization, will stop when it reaches zero.
diff --git a/liblll/CodeFragment.h b/liblll/CodeFragment.h
index 6622de3e7..95d21563f 100644
--- a/liblll/CodeFragment.h
+++ b/liblll/CodeFragment.h
@@ -50,8 +50,8 @@ public:
 private:
 	void finalise(CompilerState const& _cs);
 
-	template <class T> void error() const { BOOST_THROW_EXCEPTION(T() ); }
-	template <class T> void error(std::string const& reason) const {
+	template <class T> static void error() { BOOST_THROW_EXCEPTION(T() ); }
+	template <class T> static void error(std::string const& reason) {
 		auto err = T();
 		err << errinfo_comment(reason);
 		BOOST_THROW_EXCEPTION(err);
diff --git a/libsolidity/ast/ASTJsonConverter.h b/libsolidity/ast/ASTJsonConverter.h
index cc589d4a4..186607cef 100644
--- a/libsolidity/ast/ASTJsonConverter.h
+++ b/libsolidity/ast/ASTJsonConverter.h
@@ -119,7 +119,7 @@ private:
 	);
 	std::string sourceLocationToString(SourceLocation const& _location) const;
 	std::string namePathToString(std::vector<ASTString> const& _namePath) const;
-	Json::Value idOrNull(ASTNode const* _pt) const
+	static Json::Value idOrNull(ASTNode const* _pt)
 	{
 		return _pt ? Json::Value(nodeId(*_pt)) : Json::nullValue;
 	}
@@ -134,12 +134,12 @@ private:
 	std::string literalTokenKind(Token::Value _token);
 	std::string type(Expression const& _expression);
 	std::string type(VariableDeclaration const& _varDecl);
-	int nodeId(ASTNode const& _node) const
+	static int nodeId(ASTNode const& _node)
 	{
 		return _node.id();
 	}
 	template<class Container>
-	Json::Value getContainerIds(Container const& container) const
+	static Json::Value getContainerIds(Container const& container)
 	{
 		Json::Value tmp(Json::arrayValue);
 		for (auto const& element: container)
diff --git a/libsolidity/codegen/ABIFunctions.cpp b/libsolidity/codegen/ABIFunctions.cpp
index 2313473f5..a2938ed79 100644
--- a/libsolidity/codegen/ABIFunctions.cpp
+++ b/libsolidity/codegen/ABIFunctions.cpp
@@ -1056,7 +1056,7 @@ string ABIFunctions::createFunction(string const& _name, function<string ()> con
 	return _name;
 }
 
-size_t ABIFunctions::headSize(TypePointers const& _targetTypes) const
+size_t ABIFunctions::headSize(TypePointers const& _targetTypes)
 {
 	size_t headSize = 0;
 	for (auto const& t: _targetTypes)
diff --git a/libsolidity/codegen/ABIFunctions.h b/libsolidity/codegen/ABIFunctions.h
index 103df5aee..e43e2323a 100644
--- a/libsolidity/codegen/ABIFunctions.h
+++ b/libsolidity/codegen/ABIFunctions.h
@@ -162,7 +162,7 @@ private:
 	std::string createFunction(std::string const& _name, std::function<std::string()> const& _creator);
 
 	/// @returns the size of the static part of the encoding of the given types.
-	size_t headSize(TypePointers const& _targetTypes) const;
+	static size_t headSize(TypePointers const& _targetTypes);
 
 	/// Map from function name to code for a multi-use function.
 	std::map<std::string, std::string> m_requestedFunctions;
diff --git a/libsolidity/inlineasm/AsmCodeGen.cpp b/libsolidity/inlineasm/AsmCodeGen.cpp
index 24aa4ba8d..6d0c02558 100644
--- a/libsolidity/inlineasm/AsmCodeGen.cpp
+++ b/libsolidity/inlineasm/AsmCodeGen.cpp
@@ -127,7 +127,7 @@ public:
 	}
 
 private:
-	LabelID assemblyTagToIdentifier(eth::AssemblyItem const& _tag) const
+	static LabelID assemblyTagToIdentifier(eth::AssemblyItem const& _tag)
 	{
 		u256 id = _tag.data();
 		solAssert(id <= std::numeric_limits<LabelID>::max(), "Tag id too large.");