diff --git a/src/os/user/listgroups_solaris.go b/src/os/user/listgroups_solaris.go
index 28a8a78dbb..f3cbf6ce4a 100644
--- a/src/os/user/listgroups_solaris.go
+++ b/src/os/user/listgroups_solaris.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build cgo
+// +build cgo,!osusergo
 
 // Even though this file requires no C, it is used to provide a
 // listGroup stub because all the other Solaris calls work.  Otherwise,