diff --git a/pyqtgraph/graphicsItems/PlotCurveItem.py b/pyqtgraph/graphicsItems/PlotCurveItem.py
index c3a58da2..b6c6d216 100644
--- a/pyqtgraph/graphicsItems/PlotCurveItem.py
+++ b/pyqtgraph/graphicsItems/PlotCurveItem.py
@@ -613,7 +613,7 @@ class PlotCurveItem(GraphicsObject):
             return
         if self.mouseShape().contains(ev.pos()):
             ev.accept()
-            self.sigClicked.emit(self)
+            self.sigClicked.emit(self, ev)