diff --git a/asyncua/common/node.py b/asyncua/common/node.py
index 0461b6903..b289ab2be 100644
--- a/asyncua/common/node.py
+++ b/asyncua/common/node.py
@@ -258,7 +258,8 @@ async def write_attribute(self, attributeid, datavalue, indexrange=None):
         Set an attribute of a node
         attributeid is a member of ua.AttributeIds
         datavalue is a ua.DataValue object
-        indexrange is a NumericRange (a string)
+        indexrange is a NumericRange (a string; e.g. "1" or "1:3".  
+            See https://reference.opcfoundation.org/v104/Core/docs/Part4/7.22/)
         """
         attr = ua.WriteValue()
         attr.NodeId = self.nodeid