1 files changed, 2 insertions, 1 deletions

diff --git a/dir.c b/dir.c
index b0a1d9eaf5..e2304a69f4 100644
--- a/dir.c
+++ b/dir.c
@@ -590,7 +590,8 @@ dir_read(VALUE dir)
     else {
 	rb_sys_fail(0);
     }
-    return Qnil;		/* not reached */
+
+    UNREACHABLE;
 }
 
 /*