diff --git a/pyqtgraph/graphicsItems/InfiniteLine.py b/pyqtgraph/graphicsItems/InfiniteLine.py
index 7a4ce5f3..74a8da95 100644
--- a/pyqtgraph/graphicsItems/InfiniteLine.py
+++ b/pyqtgraph/graphicsItems/InfiniteLine.py
@@ -225,7 +225,7 @@ class InfiniteLine(GraphicsObject):
 
     def setPos(self, pos):
 
-        if type(pos) in [list, tuple, np.ndarray]:
+        if isinstance(pos, (list, tuple, np.ndarray)) and not np.ndim(pos) == 0:
             newPos = list(pos)
         elif isinstance(pos, QtCore.QPointF):
             newPos = [pos.x(), pos.y()]