diff --git a/libsolidity/NameAndTypeResolver.cpp b/libsolidity/NameAndTypeResolver.cpp
index 1491068eb..abf0788a8 100644
--- a/libsolidity/NameAndTypeResolver.cpp
+++ b/libsolidity/NameAndTypeResolver.cpp
@@ -136,7 +136,7 @@ bool NameAndTypeResolver::updateDeclaration(Declaration const& _declaration)
 		m_scopes[nullptr].registerDeclaration(_declaration, false, true);
 		solAssert(_declaration.scope() == nullptr, "Updated declaration outside global scope.");
 	}
-	catch(FatalError _error)
+	catch(FatalError const& _error)
 	{
 		return false;
 	}
diff --git a/libsolidity/NameAndTypeResolver.h b/libsolidity/NameAndTypeResolver.h
index 6f3a4c873..7169f302a 100644
--- a/libsolidity/NameAndTypeResolver.h
+++ b/libsolidity/NameAndTypeResolver.h
@@ -108,7 +108,7 @@ private:
 	// creates the Declaration error and adds it in the errors list
 	void reportTypeError(Error const& _e);
 	// creates the Declaration error and adds it in the errors list and throws FatalError
-	void reportFatalTypeError(const Error& _e);
+	void reportFatalTypeError(Error const& _e);
 
 	DeclarationContainer* m_currentScope = nullptr;
 	ErrorList& m_errors;