diff --git a/plumbum/commands/base.py b/plumbum/commands/base.py
index 3172c526..03d74d7c 100644
--- a/plumbum/commands/base.py
+++ b/plumbum/commands/base.py
@@ -533,9 +533,8 @@ def _get_encoding(self):
     def formulate(self, level=0, args=()):
         return [
             f"echo {shquote(self.data)}",
-            "|",
-            self.cmd.formulate(level + 1, args),
-        ]
+            "|"
+        ] + self.cmd.formulate(level + 1, args),
 
     @property
     def machine(self):