diff --git a/pyqtgraph/graphicsItems/PlotItem/PlotItem.py b/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
index 7d23309b..318351f4 100644
--- a/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
+++ b/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
@@ -1019,7 +1019,7 @@ class PlotItem(GraphicsWidget):
             if numCurves != -1:
                 if self.ctrl.forgetTracesCheck.isChecked():
                     curve.clear()
-                    self.removeItem(curves[i])
+                    self.removeItem(curve)
                 else:
                     curve.hide()