diff --git a/cmd/age-keygen/keygen.go b/cmd/age-keygen/keygen.go
index 3971d371..5be3c5e2 100644
--- a/cmd/age-keygen/keygen.go
+++ b/cmd/age-keygen/keygen.go
@@ -158,5 +158,5 @@ func errorf(format string, v ...interface{}) {
 }
 
 func warning(msg string) {
-	log.Printf("age-keygen: warning: " + msg)
+	log.Print("age-keygen: warning: " + msg)
 }