diff --git a/klog.go b/klog.go
index 25483fad..f4af8f28 100644
--- a/klog.go
+++ b/klog.go
@@ -861,6 +861,9 @@ func (rb *redirectBuffer) Write(bytes []byte) (n int, err error) {
 //   ...
 //   klog.SetLogger(zapr.NewLogger(zapLog))
 func SetLogger(logr logr.Logger) {
+	logging.mu.Lock()
+	defer logging.mu.Unlock()
+
 	logging.logr = logr
 }