1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index ff1c74a3e..6e76f23c8 100644
--- a/io.c
+++ b/io.c
@@ -5821,7 +5821,7 @@ argf_init(struct argf *p, VALUE v)
 {
     p->filename = Qnil;
     p->current_file = Qnil;
-    p->lineno = Qnil;
+    p->lineno = INT2FIX(0);
     p->argv = v;
 }