diff --git a/Changes.md b/Changes.md
index 68f60877515..ff974f10382 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,6 +1,10 @@
 1.5.x.x (relative to 1.5.2.0)
 =======
 
+Fixes
+-----
+
+- VisualiserTool : Fixed bug where the value dragged from the visualiser would be slightly different from the initial value on button press. (#6191)
 
 
 1.5.2.0 (relative to 1.5.1.0)
diff --git a/include/GafferSceneUI/Private/VisualiserTool.h b/include/GafferSceneUI/Private/VisualiserTool.h
index 05091411474..f3659a95c33 100644
--- a/include/GafferSceneUI/Private/VisualiserTool.h
+++ b/include/GafferSceneUI/Private/VisualiserTool.h
@@ -152,7 +152,7 @@ class GAFFERSCENEUI_API VisualiserTool : public SelectionTool
 		bool m_gadgetDirty;
 		mutable bool m_selectionDirty;
 		bool m_priorityPathsDirty;
-		bool m_acceptedButtonPress;
+		IECore::DataPtr m_valueAtButtonPress;
 		bool m_initiatedDrag;
 
 		static ToolDescription<VisualiserTool, SceneView> m_toolDescription;
diff --git a/src/GafferSceneUI/VisualiserTool.cpp b/src/GafferSceneUI/VisualiserTool.cpp
index 70a5551eacf..ce24671ff3e 100644
--- a/src/GafferSceneUI/VisualiserTool.cpp
+++ b/src/GafferSceneUI/VisualiserTool.cpp
@@ -689,7 +689,7 @@ VisualiserTool::VisualiserTool( SceneView *view, const std::string &name ) : Sel
 	m_gadgetDirty( true ),
 	m_selectionDirty( true ),
 	m_priorityPathsDirty( true ),
-	m_acceptedButtonPress( false ),
+	m_valueAtButtonPress(),
 	m_initiatedDrag( false )
 {
 	view->viewportGadget()->addChild( m_gadget );
@@ -956,7 +956,7 @@ bool VisualiserTool::keyPress( const KeyEvent &event )
 
 bool VisualiserTool::buttonPress( const ButtonEvent &event )
 {
-	m_acceptedButtonPress = false;
+	m_valueAtButtonPress.reset();
 	m_initiatedDrag = false;
 
 	if( event.button & ButtonEvent::Left && !( event.modifiers & GafferUI::ButtonEvent::Modifiers::Control ) )
@@ -964,7 +964,7 @@ bool VisualiserTool::buttonPress( const ButtonEvent &event )
 		updateCursorValue();
 		if( m_cursorValue )
 		{
-			m_acceptedButtonPress = true;
+			m_valueAtButtonPress = m_cursorValue->copy();
 			return true;
 		}
 	}
@@ -974,7 +974,7 @@ bool VisualiserTool::buttonPress( const ButtonEvent &event )
 
 bool VisualiserTool::buttonRelease( const ButtonEvent &event )
 {
-	m_acceptedButtonPress = false;
+	m_valueAtButtonPress.reset();
 	m_initiatedDrag = false;
 
 	return false;
@@ -984,27 +984,22 @@ RunTimeTypedPtr VisualiserTool::dragBegin( const DragDropEvent &event )
 {
 	m_initiatedDrag = false;
 
-	if( !m_acceptedButtonPress )
+	if( !m_valueAtButtonPress )
 	{
 		return RunTimeTypedPtr();
 	}
 
-	m_acceptedButtonPress = false;
+	// NOTE : There is a possibility that the tool has become inactive since the button
+	//        press event that triggered the drag was accepted, the cutoff point is the
+	//        button press event, so any change to the active state after that does not
+	//        affect an ongoing drag operation. We therefore always request a redraw
+	//        here so that the displayed value is cleared.
 
-	if( m_cursorValue )
-	{
-		// NOTE : There is a possibility that the tool has become inactive since the button
-		//        press event that triggered the drag was accepted, the cutoff point is the
-		//        button press event, so any change to the active state after that does not
-		//        affect an ongoing drag operation. We therefore always request a redraw
-		//        here so that the displayed value is cleared.
-
-		m_initiatedDrag = true;
-		view()->viewportGadget()->renderRequestSignal()( view()->viewportGadget() );
-		Pointer::setCurrent( "values" );
-	}
+	m_initiatedDrag = true;
+	view()->viewportGadget()->renderRequestSignal()( view()->viewportGadget() );
+	Pointer::setCurrent( "values" );
 
-	return m_cursorValue;
+	return m_valueAtButtonPress;
 }
 
 bool VisualiserTool::dragEnd( const DragDropEvent &event )