diff --git a/ui/terminal/status.go b/ui/terminal/status.go
index 481c511..69a2a09 100644
--- a/ui/terminal/status.go
+++ b/ui/terminal/status.go
@@ -15,6 +15,8 @@
 package terminal
 
 import (
+	"io"
+
 	"android/soong/ui/status"
 )
 
@@ -24,10 +26,10 @@
 //
 // statusFormat takes nearly all the same options as NINJA_STATUS.
 // %c is currently unsupported.
-func NewStatusOutput(w Writer, statusFormat string, quietBuild bool) status.StatusOutput {
+func NewStatusOutput(w io.Writer, statusFormat string, quietBuild bool) status.StatusOutput {
 	formatter := newFormatter(statusFormat, quietBuild)
 
-	if w.isSmartTerminal() {
+	if isSmartTerminal(w) {
 		return NewSmartStatusOutput(w, formatter)
 	} else {
 		return NewDumbStatusOutput(w, formatter)