diff --git a/src/net/nss.go b/src/net/nss.go
index fb12d6fdebf05..ad4c18145e072 100644
--- a/src/net/nss.go
+++ b/src/net/nss.go
@@ -27,7 +27,7 @@ type nsswitchConfig struct {
 	ch          chan struct{} // guards lastChecked and modTime
 	lastChecked time.Time     // last time nsswitch.conf was checked
 
-	mu      sync.RWMutex // protects nssConf
+	mu      sync.Mutex // protects nssConf
 	nssConf *nssConf
 }