diff --git a/pyqtgraph/graphicsItems/ArrowItem.py b/pyqtgraph/graphicsItems/ArrowItem.py
index 7f6abbed..77e6195f 100644
--- a/pyqtgraph/graphicsItems/ArrowItem.py
+++ b/pyqtgraph/graphicsItems/ArrowItem.py
@@ -48,7 +48,7 @@ class ArrowItem(QtGui.QGraphicsPathItem):
         All arguments are optional:
         
         ======================  =================================================
-        **Keyword Arguments**
+        **Keyword Arguments:**
         angle                   Orientation of the arrow in degrees. Default is
                                 0; arrow pointing to the left.
         headLen                 Length of the arrow head, from tip to base.