diff --git a/commands/mkfifo/mkfifo.c b/commands/mkfifo/mkfifo.c
index ee74ca03a..368787def 100644
--- a/commands/mkfifo/mkfifo.c
+++ b/commands/mkfifo/mkfifo.c
@@ -106,7 +106,7 @@ main(argc, argv)
 	exit(exitval);
 }
 
-void
+static void
 usage()
 {
 	(void)fprintf(stderr, "usage: mkfifo [-m mode] fifoname ...\n");