Index: src/SynTree/ZeroOneType.cc
===================================================================
--- src/SynTree/ZeroOneType.cc	(revision b3c36f41fb2d199b6fa2a40962f5aafe79f7ceeb)
+++ src/SynTree/ZeroOneType.cc	(revision af397ef8f0a43077863974fc725f7ae0d12ca892)
@@ -20,5 +20,5 @@
 ZeroType::ZeroType( Type::Qualifiers tq, const std::list< Attribute * > & attributes ) : Type( tq, attributes ) {}
 
-void ZeroType::print( std::ostream &os, int indent ) const {
+void ZeroType::print( std::ostream &os, __attribute__((unused)) int indent ) const {
 	os << "zero_t";
 }
@@ -28,5 +28,5 @@
 OneType::OneType( Type::Qualifiers tq, const std::list< Attribute * > & attributes ) : Type( tq, attributes ) {}
 
-void OneType::print( std::ostream &os, int indent ) const {
+void OneType::print( std::ostream &os, __attribute__((unused)) int indent ) const {
 	os << "one_t";
 }