diff --git a/src/pkg/runtime/debug/stack_test.go b/src/pkg/runtime/debug/stack_test.go
index cf4bd0238e7..94293bb934b 100644
--- a/src/pkg/runtime/debug/stack_test.go
+++ b/src/pkg/runtime/debug/stack_test.go
@@ -5,7 +5,6 @@
 package debug
 
 import (
-	. "runtime/debug"
 	"strings"
 	"testing"
 )