diff --git a/bonzai.go b/bonzai.go
index 7a58458..d6b8fa3 100644
--- a/bonzai.go
+++ b/bonzai.go
@@ -15,7 +15,7 @@ import (
 // args expected and "none" if not. Methods must never write error
 // output to anything but standard error and should almost always use
 // the log package to do so.
-type Method func(args ...string) error
+type Method func(caller *Cmd, args ...string) error
 
 // ----------------------- errors, exit, debug -----------------------
 
diff --git a/cmd.go b/cmd.go
index 9b89b52..73250f1 100644
--- a/cmd.go
+++ b/cmd.go
@@ -95,7 +95,7 @@ func (x *Cmd) Run() {
 			if def.Call == nil {
 				ExitError("default command \"%v\" must be callable", def.Name)
 			}
-			if err := def.Call(args...); err != nil {
+			if err := def.Call(x, args...); err != nil {
 				ExitError(err)
 			}
 			Exit()
@@ -104,7 +104,7 @@ func (x *Cmd) Run() {
 	}
 
 	// delegate
-	if err := cmd.Call(args...); err != nil {
+	if err := cmd.Call(x, args...); err != nil {
 		ExitError(err)
 	}
 	Exit()