diff --git a/pyqtgraph/widgets/RawImageWidget.py b/pyqtgraph/widgets/RawImageWidget.py
index 657701f9..ae6448c6 100644
--- a/pyqtgraph/widgets/RawImageWidget.py
+++ b/pyqtgraph/widgets/RawImageWidget.py
@@ -21,7 +21,7 @@ class RawImageWidget(QtGui.QWidget):
         """
         Setting scaled=True will cause the entire image to be displayed within the boundaries of the widget. This also greatly reduces the speed at which it will draw frames.
         """
-        QtGui.QWidget.__init__(self, parent=None)
+        QtGui.QWidget.__init__(self, parent)
         self.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding,QtGui.QSizePolicy.Expanding))
         self.scaled = scaled
         self.opts = None
@@ -69,7 +69,7 @@ if HAVE_OPENGL:
         Perfomance varies between platforms; see examples/VideoSpeedTest for benchmarking.
         """
         def __init__(self, parent=None, scaled=False):
-            QtOpenGL.QGLWidget.__init__(self, parent=None)
+            QtOpenGL.QGLWidget.__init__(self, parent)
             self.scaled = scaled
             self.image = None
             self.uploaded = False