1 files changed, 4 insertions, 1 deletions
diff --git a/gc.c b/gc.c
index 928c312bea..bd1a13cfaf 100644
--- a/gc.c
+++ b/gc.c
@@ -1837,9 +1837,12 @@ os_each_obj(int argc, VALUE *argv, VALUE os)
     VALUE of;
 
     rb_secure(4);
-    if (rb_scan_args(argc, argv, "01", &of) == 0) {
+    if (argc == 0) {
 	of = 0;
     }
+    else {
+	rb_scan_args(argc, argv, "01", &of);
+    }
     RETURN_ENUMERATOR(os, 1, &of);
     return os_obj_of(of);
 }