diff --git a/Changes.md b/Changes.md
index 4de87d07586..a9050ce44aa 100644
--- a/Changes.md
+++ b/Changes.md
@@ -10,6 +10,7 @@ Breaking Changes
 ----------------
 
 - CyclesOptions : Removed `cycles:integrator:sampling_pattern` option. This is intended only for debugging, but is still available via a CustomOptions node.
+- CyclesAttributes : Removed the `cycles:dupliGenerated` and `cycles:dupliUV` attributes.
 
 1.4.0.0b3 (relative to 1.4.0.0b2)
 =========
diff --git a/python/GafferCyclesUI/CyclesAttributesUI.py b/python/GafferCyclesUI/CyclesAttributesUI.py
index 9e0588cfca1..f6cb68a32cc 100644
--- a/python/GafferCyclesUI/CyclesAttributesUI.py
+++ b/python/GafferCyclesUI/CyclesAttributesUI.py
@@ -51,7 +51,7 @@ def __visibilitySummary( plug ) :
 def __renderingSummary( plug ) :
 
 	info = []
-	for childName in ( "useHoldout", "isShadowCatcher", "isCausticsCaster", "isCausticsReceiver", "dupliGenerated", "dupliUV", "lightGroup" ) :
+	for childName in ( "useHoldout", "isShadowCatcher", "isCausticsCaster", "isCausticsReceiver", "lightGroup" ) :
 		if plug[childName]["enabled"].getValue() :
 			info.append( IECore.CamelCase.toSpaced( childName ) + ( " On" if plug[childName]["value"].getValue() else " Off" ) )
 
@@ -245,28 +245,6 @@ def __shaderSummary( plug ) :
 
 		],
 
-		"attributes.dupliGenerated" : [
-
-			"description",
-			"""
-			Set a unique position offset. Accessible from a texture_coordinate
-			via the generated output plug and from_dupli enabled.
-			""",
-
-			"layout:section", "Rendering",
-		],
-
-		"attributes.dupliUV" : [
-
-			"description",
-			"""
-			Set a unique UV offset. Accessible from either a texture_coordinate
-			or uv_map node via the UV output plug and from_dupli enabled.
-			""",
-
-			"layout:section", "Rendering",
-		],
-
 		"attributes.lightGroup" : [
 
 			"description",
diff --git a/src/GafferCycles/CyclesAttributes.cpp b/src/GafferCycles/CyclesAttributes.cpp
index 5705a5e86ce..677eadffa3b 100644
--- a/src/GafferCycles/CyclesAttributes.cpp
+++ b/src/GafferCycles/CyclesAttributes.cpp
@@ -76,10 +76,6 @@ CyclesAttributes::CyclesAttributes( const std::string &name )
 	attributes->addChild( new Gaffer::NameValuePlug( "cycles:volume_step_size", new IECore::FloatData( 0.0f ), false, "volumeStepSize" ) );
 	attributes->addChild( new Gaffer::NameValuePlug( "cycles:volume_object_space", new IECore::BoolData( true ), false, "volumeObjectSpace" ) );
 
-	// Per-object parameters
-	attributes->addChild( new Gaffer::NameValuePlug( "cycles:dupli_generated", new IECore::V3fData( Imath::V3f( 0.0f ) ), false, "dupliGenerated" ) );
-	attributes->addChild( new Gaffer::NameValuePlug( "cycles:dupli_uv", new IECore::V2fData( Imath::V2f( 0.0f ) ), false, "dupliUV" ) );
-
 	// Asset name for cryptomatte
 	attributes->addChild( new Gaffer::NameValuePlug( "cycles:asset_name", new IECore::StringData( "" ), false, "assetName" ) );
 
diff --git a/src/GafferCycles/IECoreCyclesPreview/Renderer.cpp b/src/GafferCycles/IECoreCyclesPreview/Renderer.cpp
index 7fbc2a4faf1..661c642300d 100644
--- a/src/GafferCycles/IECoreCyclesPreview/Renderer.cpp
+++ b/src/GafferCycles/IECoreCyclesPreview/Renderer.cpp
@@ -840,9 +840,6 @@ IECore::InternedString g_maxLevelAttributeName( "cycles:max_level" );
 IECore::InternedString g_dicingRateAttributeName( "cycles:dicing_rate" );
 // Cycles Light
 IECore::InternedString g_cyclesLightAttributeName( "cycles:light" );
-// Dupli
-IECore::InternedString g_dupliGeneratedAttributeName( "cycles:dupli_generated" );
-IECore::InternedString g_dupliUVAttributeName( "cycles:dupli_uv" );
 // Shader Assignment
 IECore::InternedString g_cyclesSurfaceShaderAttributeName( "cycles:surface" );
 IECore::InternedString g_oslSurfaceShaderAttributeName( "osl:surface" );
@@ -902,8 +899,6 @@ class CyclesAttributes : public IECoreScenePreview::Renderer::AttributesInterfac
 				m_maxLevel( 1 ),
 				m_dicingRate( 1.0f ),
 				m_color( Color3f( 1.0f ) ),
-				m_dupliGenerated( V3f( 0.0f ) ),
-				m_dupliUV( V2f( 0.0f) ),
 				m_volume( attributes ),
 				m_shaderAttributes( attributes ),
 				m_assetName( "" ),
@@ -926,8 +921,6 @@ class CyclesAttributes : public IECoreScenePreview::Renderer::AttributesInterfac
 			m_maxLevel = attributeValue<int>( g_maxLevelAttributeName, attributes, m_maxLevel );
 			m_dicingRate = attributeValue<float>( g_dicingRateAttributeName, attributes, m_dicingRate );
 			m_color = attributeValue<Color3f>( g_displayColorAttributeName, attributes, m_color );
-			m_dupliGenerated = attributeValue<V3f>( g_dupliGeneratedAttributeName, attributes, m_dupliGenerated );
-			m_dupliUV = attributeValue<V2f>( g_dupliUVAttributeName, attributes, m_dupliUV );
 			m_lightGroup = attributeValue<std::string>( g_lightGroupAttributeName, attributes, m_lightGroup );
 			m_assetName = attributeValue<std::string>( g_cryptomatteAssetAttributeName, attributes, m_assetName );
 			m_isCausticsCaster = attributeValue<bool>( g_isCausticsCasterAttributeName, attributes, m_isCausticsCaster );
@@ -1070,8 +1063,6 @@ class CyclesAttributes : public IECoreScenePreview::Renderer::AttributesInterfac
 			object->set_shadow_terminator_shading_offset( m_shadowTerminatorShadingOffset );
 			object->set_shadow_terminator_geometry_offset( m_shadowTerminatorGeometryOffset );
 			object->set_color( SocketAlgo::setColor( m_color ) );
-			object->set_dupli_generated( SocketAlgo::setVector( m_dupliGenerated ) );
-			object->set_dupli_uv( SocketAlgo::setVector( m_dupliUV ) );
 			object->set_asset_name( ccl::ustring( m_assetName.c_str() ) );
 			object->set_is_caustics_caster( m_isCausticsCaster );
 			object->set_is_caustics_receiver( m_isCausticsReceiver );
@@ -1307,8 +1298,6 @@ class CyclesAttributes : public IECoreScenePreview::Renderer::AttributesInterfac
 		int m_maxLevel;
 		float m_dicingRate;
 		Color3f m_color;
-		V3f m_dupliGenerated;
-		V2f m_dupliUV;
 		Volume m_volume;
 		ShaderAttributes m_shaderAttributes;
 		InternedString m_assetName;