diff --git a/libs/container/hashtable.h b/libs/container/hashtable.h
index 7e4d8227..cdab5f2c 100644
--- a/libs/container/hashtable.h
+++ b/libs/container/hashtable.h
@@ -289,10 +289,10 @@ private:
 	void size_decrement(){
 		--m_size;
 	}
-
-	HashTable( const HashTable& other );
-	HashTable& operator=( const HashTable& other );
 public:
+	HashTable( const HashTable& other ) = delete; // not copyable
+	HashTable& operator=( const HashTable& other ) = delete; // not assignable
+
 	HashTable() : m_bucketCount( 0 ), m_buckets( 0 ), m_size( 0 ){
 		initialise();
 	}
diff --git a/libs/gtkutil/widget.h b/libs/gtkutil/widget.h
index f2f392a8..b1fb880c 100644
--- a/libs/gtkutil/widget.h
+++ b/libs/gtkutil/widget.h
@@ -81,9 +81,6 @@ class ToggleShown
 {
 	bool m_shownDeferred;
 
-	ToggleShown( const ToggleShown& other ); // NOT COPYABLE
-	ToggleShown& operator=( const ToggleShown& other ); // NOT ASSIGNABLE
-
 	static gboolean notify_visible( GtkWidget* widget, gpointer dummy, ToggleShown* self ){
 		/* destroy = notify::visible with visible = 0, thus let's filter it out  */
 		if( gtk_main_level() > 0 ){ //== 0 at destroy time
@@ -103,6 +100,9 @@ public:
 	GtkWidget* m_widget;
 	ToggleItem m_item;
 
+	ToggleShown( const ToggleShown& other ) = delete; // NOT COPYABLE
+	ToggleShown& operator=( const ToggleShown& other ) = delete; // NOT ASSIGNABLE
+
 	ToggleShown( bool shown )
 		: m_shownDeferred( shown ), m_widget( 0 ), m_item( ActiveCaller( *this ) ){
 	}
diff --git a/libs/imagelib.h b/libs/imagelib.h
index bfe278d9..c5550bf9 100644
--- a/libs/imagelib.h
+++ b/libs/imagelib.h
@@ -34,12 +34,13 @@ struct RGBAPixel
 
 class RGBAImage : public Image
 {
-	RGBAImage( const RGBAImage& other );
-	RGBAImage& operator=( const RGBAImage& other );
 public:
 	RGBAPixel* pixels;
 	unsigned int width, height;
 
+	RGBAImage( const RGBAImage& other ) = delete; // not copyable
+	RGBAImage& operator=( const RGBAImage& other ) = delete; // not assignable
+
 	RGBAImage( unsigned int _width, unsigned int _height )
 		: pixels( new RGBAPixel[_width * _height] ), width( _width ), height( _height ){
 	}
diff --git a/plugins/entity/modelskinkey.h b/plugins/entity/modelskinkey.h
index 60fd8d5d..16da57bc 100644
--- a/plugins/entity/modelskinkey.h
+++ b/plugins/entity/modelskinkey.h
@@ -40,9 +40,6 @@ class ModelSkinKey : public ModuleObserver
 	ModelSkin* m_skin;
 	Callback m_skinChangedCallback;
 
-	ModelSkinKey( const ModelSkinKey& );
-	ModelSkinKey operator=( const ModelSkinKey& );
-
 	void construct(){
 		m_skin = &GlobalModelSkinCache().capture( m_name.c_str() );
 		m_skin->attach( *this );
@@ -53,6 +50,9 @@ class ModelSkinKey : public ModuleObserver
 	}
 
 public:
+	ModelSkinKey( const ModelSkinKey& ) = delete; // not copyable
+	ModelSkinKey operator=( const ModelSkinKey& ) = delete; // not assignable
+
 	ModelSkinKey( const Callback& skinChangedCallback ) : m_skinChangedCallback( skinChangedCallback ){
 		construct();
 	}
diff --git a/plugins/entity/namekeys.h b/plugins/entity/namekeys.h
index b5e3dc38..7d9e1c1b 100644
--- a/plugins/entity/namekeys.h
+++ b/plugins/entity/namekeys.h
@@ -55,8 +55,6 @@ class NameKeys : public Entity::Observer, public Namespaced
 	Namespace* m_namespace;
 	EntityKeyValues& m_entity;
 	KeyIsNameFunc m_keyIsName;
-	NameKeys( const NameKeys& other );
-	NameKeys& operator=( const NameKeys& other );
 
 	typedef std::map<CopiedString, EntityKeyValue*> KeyValues;
 	KeyValues m_keyValues;
@@ -86,6 +84,9 @@ class NameKeys : public Entity::Observer, public Namespaced
 		}
 	}
 public:
+	NameKeys( const NameKeys& other ) = delete; // not copyable
+	NameKeys& operator=( const NameKeys& other ) = delete; // not assignable
+
 	NameKeys( EntityKeyValues& entity ) : m_namespace( 0 ), m_entity( entity ), m_keyIsName( Static<KeyIsName>::instance().m_keyIsName ){
 		m_entity.attach( *this );
 	}
diff --git a/plugins/model/model.cpp b/plugins/model/model.cpp
index f884e27e..81ae8ae0 100644
--- a/plugins/model/model.cpp
+++ b/plugins/model/model.cpp
@@ -453,9 +453,6 @@ class PicoModelInstance :
 	};
 	typedef Array<Remap> SurfaceRemaps;
 	SurfaceRemaps m_skins;
-
-	PicoModelInstance( const PicoModelInstance& );
-	PicoModelInstance operator=( const PicoModelInstance& );
 public:
 	typedef LazyStatic<TypeCasts> StaticTypeCasts;
 
@@ -508,6 +505,9 @@ public:
 		constructRemaps();
 	}
 
+	PicoModelInstance( const PicoModelInstance& ) = delete; // not copyable
+	PicoModelInstance operator=( const PicoModelInstance& ) = delete; // not assignable
+
 	PicoModelInstance( const scene::Path& path, scene::Instance* parent, PicoModel& picomodel ) :
 		Instance( path, parent, this, StaticTypeCasts::instance().get() ),
 		m_picomodel( picomodel ),
diff --git a/radiant/brush.h b/radiant/brush.h
index 6f3e1c31..d351d898 100644
--- a/radiant/brush.h
+++ b/radiant/brush.h
@@ -378,7 +378,7 @@ public:
 		releaseShader();
 	}
 // copy-construction not supported
-	FaceShader( const FaceShader& other );
+	FaceShader( const FaceShader& other ) = delete;
 
 	void instanceAttach(){
 		m_instanced = true;
@@ -487,10 +487,6 @@ public:
 
 class FaceTexdef : public FaceShaderObserver
 {
-// not copyable
-	FaceTexdef( const FaceTexdef& other );
-// not assignable
-	FaceTexdef& operator=( const FaceTexdef& other );
 public:
 	class SavedState
 	{
@@ -511,6 +507,11 @@ public:
 	bool m_projectionInitialised;
 	bool m_scaleApplied;
 
+// not copyable
+	FaceTexdef( const FaceTexdef& other ) = delete;
+// not assignable
+	FaceTexdef& operator=( const FaceTexdef& other ) = delete;
+
 	FaceTexdef(
 	    FaceShader& shader,
 	    const TextureProjection& projection,
@@ -958,13 +959,13 @@ private:
 	UndoObserver* m_undoable_observer;
 	MapFile* m_map;
 
-// assignment not supported
-	Face& operator=( const Face& other );
-// copy-construction not supported
-	Face( const Face& other );
-
 public:
 
+// assignment not supported
+	Face& operator=( const Face& other ) = delete;
+// copy-construction not supported
+	Face( const Face& other ) = delete;
+
 	Face( FaceObserver* observer ) :
 		m_refcount( 0 ),
 		m_shader( texdef_name_default() ),
@@ -1704,7 +1705,7 @@ public:
 	}
 
 // assignment not supported
-	Brush& operator=( const Brush& other );
+	Brush& operator=( const Brush& other ) = delete;
 
 	void setDoom3GroupOrigin( const Vector3& origin ){
 		//globalOutputStream() << "func_static origin before: " << m_funcStaticOrigin << " after: " << origin << "\n";
@@ -3425,9 +3426,6 @@ class BrushInstance :
 	const LightList* m_lightList;
 
 	BrushTransformModifier m_transform;
-
-	BrushInstance( const BrushInstance& other ); // NOT COPYABLE
-	BrushInstance& operator=( const BrushInstance& other ); // NOT ASSIGNABLE
 public:
 	static Counter* m_counter;
 
@@ -3440,6 +3438,9 @@ public:
 
 	STRING_CONSTANT( Name, "BrushInstance" );
 
+	BrushInstance( const BrushInstance& other ) = delete; // NOT COPYABLE
+	BrushInstance& operator=( const BrushInstance& other ) = delete; // NOT ASSIGNABLE
+
 	BrushInstance( const scene::Path& path, scene::Instance* parent, Brush& brush ) :
 		Instance( path, parent, this, StaticTypeCasts::instance().get() ),
 		m_brush( brush ),
diff --git a/radiant/grid.cpp b/radiant/grid.cpp
index d9add927..5ee09b0e 100644
--- a/radiant/grid.cpp
+++ b/radiant/grid.cpp
@@ -120,12 +120,12 @@ void setGridPower( GridPower power );
 class GridMenuItem
 {
 	GridPower m_id;
-
-	GridMenuItem( const GridMenuItem& other ); // NOT COPYABLE
-	GridMenuItem& operator=( const GridMenuItem& other ); // NOT ASSIGNABLE
 public:
 	ToggleItem m_item;
 
+	GridMenuItem( const GridMenuItem& other ) = delete; // NOT COPYABLE
+	GridMenuItem& operator=( const GridMenuItem& other ) = delete; // NOT ASSIGNABLE
+
 	GridMenuItem( GridPower id ) : m_id( id ), m_item( ExportCaller( *this ) ){
 	}
 	void set(){
diff --git a/radiant/map.cpp b/radiant/map.cpp
index 1dad48d7..27732782 100644
--- a/radiant/map.cpp
+++ b/radiant/map.cpp
@@ -97,8 +97,6 @@ class NameObserver
 			m_names.erase( name_read( c_str() ) );
 		}
 	}
-
-	NameObserver& operator=( const NameObserver& other );
 public:
 	NameObserver( UniqueNames& names ) : m_names( names ){
 		construct();
@@ -106,6 +104,7 @@ public:
 	NameObserver( const NameObserver& other ) : m_names( other.m_names ), m_name( other.m_name ){
 		construct();
 	}
+	NameObserver& operator=( const NameObserver& other ) = delete; // not assignable
 	~NameObserver(){
 		destroy();
 	}
diff --git a/radiant/referencecache.cpp b/radiant/referencecache.cpp
index 190e879e..18494100 100644
--- a/radiant/referencecache.cpp
+++ b/radiant/referencecache.cpp
@@ -351,9 +351,9 @@ struct ModelResource : public Resource
 		ASSERT_MESSAGE( !realised(), "ModelResource::~ModelResource: resource reference still realised: " << makeQuoted( m_name.c_str() ) );
 	}
 	// NOT COPYABLE
-	ModelResource( const ModelResource& );
+	ModelResource( const ModelResource& ) = delete;
 	// NOT ASSIGNABLE
-	ModelResource& operator=( const ModelResource& );
+	ModelResource& operator=( const ModelResource& ) = delete;
 
 	void setModel( const NodeSmartReference& model ){
 		m_model = model;