diff --git a/cocotbext/axi/axi_master.py b/cocotbext/axi/axi_master.py
index 3afa0b2..8227b37 100644
--- a/cocotbext/axi/axi_master.py
+++ b/cocotbext/axi/axi_master.py
@@ -415,8 +415,8 @@ class AxiMasterWrite(Reset):
                 if isinstance(wuser, int):
                     w.wuser = wuser
                 else:
-                    if wuser:
-                        w.wuser = wuser.pop(0)
+                    if wuser and k < len(wuser):
+                        w.wuser = wuser[k]
                     else:
                         w.wuser = 0