diff --git a/src/tr.c b/src/tr.c
index f1e2f6742..8b02dd50f 100644
--- a/src/tr.c
+++ b/src/tr.c
@@ -26,7 +26,8 @@
 #include <assert.h>
 #include <errno.h>
 #include <sys/types.h>
-#include "getopt.h"
+#include <getopt.h>
+
 #include "system.h"
 #include "version.h"